POOLING AND SERVICING AGREEMENT

EXECUTION VERSION

J.P. MORGAN ACCEPTANCE CORPORATION I

Depositor

WELLS FARGO BANK, NATIONAL ASSOCIATION

Master Servicer and Securities Administrator

and

U.S. BANK NATIONAL ASSOCIATION

Trustee

___________________________

POOLING AND SERVICING AGREEMENT

Dated as of November 1, 2006

___________________________

J.P. MORGAN ALTERNATIVE LOAN TRUST 2006-S4

MORTGAGE PASS-THROUGH CERTIFICATES

TABLE OF CONTENTS

ATTACHMENTS

Exhibit A

Forms of Certificates

Exhibit B

Form of Residual Certificate Transfer Affidavit (Transferee)

Exhibit C

Form of Residual Certificate Transfer Affidavit (Transferor)

Exhibit D

Swap Agreement Schedule

Exhibit E

List of Purchase and Servicing Agreements, Servicing Agreements and Purchase Agreements

Exhibit F

List of Custodial Agreements

Exhibit G

[Reserved]

Exhibit H

Form of Rule 144A Transfer Certificate

Exhibit I

Form of Purchaser’s Letter for Institutional Accredited Investors

Exhibit J

Form of ERISA Transfer Affidavit

Exhibit K

Form of Letter of Representations with the Depository Trust Company

Exhibit L

Form of Custodian Certification

Exhibit M

Relevant Servicing Criteria

Exhibit N

Form 10-D, Form 8-K and Form 10-K Reporting Responsibility

Exhibit O

[Reserved]
Exhibit P

[Reserved]

Exhibit Q

Form of Annual Back-Up Certification
Exhibit R

Additional Disclosure Notification

Schedule A

Mortgage Loan Schedule

This POOLING AND SERVICING AGREEMENT, dated as of November 1, 2006 (the "Agreement"), by and among J.P. MORGAN ACCEPTANCE CORPORATION I, a Delaware corporation, as depositor (the "Depositor"), U.S. BANK NATIONAL ASSOCIATION, as trustee (the "Trustee") and WELLS FARGO BANK, N.A., in its dual capacities as master servicer (the "Master Servicer") and securities administrator (the "Securities Administrator")  and acknowledged by J.P. MORGAN MORTGAGE ACQUISITION CORP., a Delaware corporation, as seller (the "Seller"), for purposes of Sections 2.04 and 2.05 and JPMORGAN CHASE BANK, NATIONAL ASSOCIATION, a national banking association and THE BANK OF NEW YORK TRUST COMPANY, N.A., a national banking association, as custodians (each a "Custodian and together, the "Custodians"), for purposes of Sections 11.06, 11.07 and 11.09.

PRELIMINARY STATEMENT

The Depositor has acquired the Mortgage Loans from the Seller and at the Closing Date is the owner of the Mortgage Loans and the other property being conveyed by the Depositor to the Trustee hereunder for inclusion in the Trust Fund.  On the Closing Date, the Depositor will acquire the Certificates from the Trustee as consideration for the Depositor’s transfer to the Trust Fund of the Mortgage Loans and the other property constituting the Trust Fund.  The Depositor has duly authorized the execution and delivery of this Agreement to provide for the conveyance to the Trustee of the Mortgage Loans and the other property constituting the Trust Fund.  All covenants and agreements made by the Depositor, the Master Servicer, the Securities Administrator and the Trustee herein, with respect to the Mortgage Loans and the other property constituting the Trust Fund, are for the benefit of the Holders from time to time of the Certificates.  The Depositor, the Trustee, the Master Servicer and the Securities Administrator are entering into this Agreement, and the Trustee is accepting the Trust Fund created hereby, for good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged.

As provided herein, the Trustee shall elect that the Trust Fund (exclusive of (i) the Swap Agreement, (ii) the Swap Trust, (iii) the Swap Account, (iv) any payments with respect to Basis Risk or Net WAC Shortfall Carryover Amounts, and (v) payments with respect to Class I Shortfalls (collectively, the "Excluded Trust Property") be treated for federal income tax purposes as comprising three real estate mortgage investment conduits (each, a "REMIC" or, in the alternative, "Lower-Tier REMIC 1," "Middle-Tier REMIC 1," and the "Upper-Tier" or "Master REMIC").  Each Certificate, other than the Class A-R Certificate, shall represent ownership of one or more regular interests in the Upper-Tier REMIC for purposes of the REMIC Provisions.  The Class A-R Certificate represents ownership of the sole class of residual interest in the Upper-Tier REMIC.  The Upper-Tier REMIC shall hold as assets the several classes of uncertificated Middle-Tier REMIC1 Interests in the Middle-Tier REMIC 1 (other than the Class 1-MT-R Interest), the Class P Reserve Fund, and the Class A-R Reserve Fund.  Each Middle-Tier REMIC 1 Interest (other than the Class MT1-R Interest) is hereby designated as a regular interest in Middle-Tier REMIC 1 (each, a "Middle-Tier REMIC 1 Interest").  Middle-Tier REMIC 1 shall hold as assets the several classes of uncertificated Lower-Tier REMIC Interests in Lower-Tier REMIC 1 (other than the Class 1-LT-R Interest.)  Lower-Tier REMIC 1 shall hold as assets all property of the Trust Fund (other than any Excluded Trust Property).   Each Lower-Tier REMIC 1 Interest (other than the Class 1-LT-R Interest) is hereby designated as a regular interest in Lower-Tier REMIC 1 (each, a "Lower-Tier REMIC 1 Regular Interest").  The latest possible maturity date of all REMIC regular interests created in this Agreement shall be the Latest Possible Maturity Date.

Lower-Tier REMIC 1:

The following table sets forth the designations, principal balances, and interest rates for each interest in Lower-Tier REMIC 1, each of which (other than the 1-LT-R interest) is hereby designated as a regular interest in Lower-Tier REMIC 1 (the "Lower-Tier REMIC 1 Regular Interests"):

___________________________

(1)  The interest rate with respect to any Distribution Date (and the related Interest Accrual Period) for the T1-A Interest is a per annum rate equal to the weighted average of the Net Mortgage Rate of all the Mortgage Loans as of the first day of the related Due Period, weighted on their outstanding principal balances of such day and adjusted to take into account any prepayments of principal occurring after such day that were distributed in the prior calendar month (the "REMIC Net WAC Rate").

 (2)  For any Distribution Date (and the related Interest Accrual Period), the interest rate for each of these interests shall be the lesser of (i) the REMIC Swap Rate for such Distribution Date, and (ii) the product of (a) the Net WAC, determined without regard to the Swap Agreement (the "REMIC Net WAC Rate") and (b) 2.

(3)  For any Distribution Date (and the related Interest Accrual Period), the interest rate for each of these interests shall be the excess, if any, of (i) the product of (a) the REMIC Net WAC Rate and (b) 2, over (ii) the REMIC Swap Rate for such Distribution Date.

(4)  The Class 1-LT-R interest shall not have a principal amount and shall not bear interest.  The Class 1-LT-R interest is hereby designated as the sole class of residual interest in Lower-Tier REMIC 1.

(5)  This interest shall have an initial principal balance equal to the excess of (i) the aggregate principal balance of the Mortgage Loans as of the Cut-off Date over (ii) the aggregate initial principal balance of each other Lower-Tier REMIC1 Regular Interest.

On each Distribution Date, the Securities Administrator shall first pay or charge as an expense of  Lower-Tier REMIC 1 all expenses of the Trust Fund for such Distribution Date, other than any Net Swap Payment or Swap Termination Payment required to be made from the Trust Fund or the Swap Trust.

On each Distribution Date, the Securities Administrator shall distribute the aggregate Interest Remittance Amount (net of expenses described in the preceding paragraph) with respect to each of the Lower-Tier REMIC 1 Regular Interests based on the above-described interest rates.

On each Distribution Date, the Securities Administrator shall distribute the aggregate Principal Remittance Amount with respect to the REMIC 1 Regular Interests, sequentially, to the Lower-Tier REMIC 1 Regular Interests in ascending order of their numerical class designation, and, with respect to each pair of classes having the same numerical designation, in equal amounts to each such class, until the principal balance of each such class is reduced to zero.  All losses on the Mortgage Loans shall be allocated among the Lower-Tier REMIC 1 Regular Interests in the same manner that principal distributions are allocated.

On each Distribution Date, the Securities Administrator shall distribute an amount equal to the amount then on deposit in the Distribution Account that represents Prepayment Premiums to the Class LT1-F48 Interest.

Middle-Tier REMIC 1:

The following table sets forth the designations, principal balances, and interest rates for each interest in Middle-Tier REMIC 1, each of which (other than the MT1-R interest) is hereby designated as a regular interest in Middle-Tier REMIC 1 (the "Middle-Tier REMIC 1 Regular Interests"):

___________________________

(1)  For any Distribution Date (and the related Interest Accrual Period), the interest rate for each of these interests is a per annum rate equal to the weighted average of the interest rates on the Lower-Tier REMIC 1 Regular Interests for such Distribution Date, provided, however, that for any Distribution Date on which the MT1-IO Interest is entitled to a portion of the interest accruals on a Lower-Tier REMIC 1 Regular Interest having an "F" in its class designation, as described in footnote two below, such weighted average shall be computed by first subjecting the rate on such Lower-Tier REMIC 1 Regular Interest to a cap equal to the product of (i) two, and (ii) Swap LIBOR for such Distribution Date (the "Middle-Tier REMIC 1 Net WAC Rate").

(2)  The Class MT1-IO is an interest only class that does not have a principal balance.  For the applicable Distribution Date listed in the first column in the table below, the Class MT1-IO shall be entitled to interest accrued on each Lower-Tier REMIC 1 Regular Interest listed in the second column in the table below at a per annum rate equal to the excess, if any, of (i) the interest rate for each such Lower-Tier REMIC 1 Regular Interest for such Distribution Date over (ii) the product of (a) two, and (b) Swap LIBOR for such Distribution Date.

(3)  The Class MT1-R interest is the sole class of residual interests in Middle-Tier REMIC 1.  It does not have an interest rate or a principal balance.

(4)  This interest shall have an initial principal balance equal to the aggregate principal balance of all the Mortgage Loans as of the Cut-off Date minus the aggregate initial principal balance of each other regular interest in Middle-Tier REMIC 1.

On each Distribution Date, interest shall be distributed on the Middle-Tier REMIC 1 Regular Interests based on the above-described interest rates , provided, however , that interest that accrues on the Class MT1-Q Interest shall be deferred in an amount equal to one-half of the increase, if any, in the Overcollateralized Amount for such Distribution Date.  Any interest so deferred shall itself bear interest at the interest rate for the Class MT1-Q Interest.  An amount equal to the interest so deferred shall be distributed as additional principal on the other Middle-Tier REMIC 1 Regular Interests having a principal balance in the manner described under priority First below.

On each Distribution Date principal shall be distributed, and Realized Losses shall be allocated, among the Middle-Tier REMIC 1 Regular Interests in the following order of priority:

First , to the Class MT1-A1A, Class MT1-A1B, Class MT1-A2A, Class MT1-A2B, Class MT1-A3A, Class MT1-A3B, Class MT1-A4, Class MT1-A5, Class MT1-A6, Class MT1-A7, Class MT1-M1, Class MT1-M2, Class MT1-M3, Class MT1-M4, Class MT1-M5, Class MT1-M6, and Class MT1-B1 Interests until the principal balance of each such Middle-Tier REMIC 1 Regular Interest equals one-half of the Class Principal Amount of the Corresponding Class of Certificates immediately after such Distribution Date; and

Second , to the Class MT1-Q Interest, any remaining amounts.

On each Distribution Date, the Securities Administrator shall distribute the Prepayment Premiums passed through with respect to the Class LT1-F48 Lower-Tier REMIC 1 Regular Interests on such Distribution Date to the Class MT1-Q Interest.

The Certificates and the Upper-Tier REMIC

The following table sets forth (or describes) the Class designation, Certificate Interest Rate, initial Class Principal Amount (or initial Class Notional Amount) and minimum denomination for each Class of Certificates comprising interests in the Trust Fund created hereunder.

_______________

(1)

On each Distribution Date, the per annum Certificate Interest Rate on each class of Fixed-Rate Certificates will be equal to the lesser of (a) the related Fixed Pass-Through Rate and (b) the Net WAC.  For purposes of the REMIC Provisions, the reference to "Net WAC" in clause (b) of the preceding sentence shall be deemed to be a reference to the Middle Tier REMIC 1 Net WAC Rate.  For any Distribution Date on which the Certificate Interest Rate for a Class of Certificates is based on the Net WAC, the amount of interest that would have been payable on such Certificates if the Middle Tier REMIC 1 Net WAC Rate were substituted for the Net WAC over the amount actually payable thereon shall be treated as having been paid to the owners of the Certificates and then deposited by such owners into the Swap Trust pursuant to Section 10.01(k) hereof.

(2)

On each Distribution Date, the per annum Certificate Interest Rate on the Class A-1-B, Class A-2-B and Class A-3-B Certificates will be equal to the least of (a) LIBOR plus the related Certificate Margin, (b) the Net WAC (adjusted for the actual number of days in the related Accrual Period) and (c) 11.50% per annum.  For purposes of the REMIC Provisions, the reference to "Net WAC" in clause (b) of the preceding sentence shall be deemed to be a reference to the Middle Tier REMIC 1 Net WAC Rate.  For any Distribution Date on which the Certificate Interest Rate for a Class of Certificates is based on the Net WAC, the amount of interest that would have been payable on such Certificates if the Middle Tier REMIC 1 Net WAC Rate were substituted for the Net WAC over the amount actually payable thereon shall be treated as having been paid to the owners of the Certificates and then deposited by such owners into the Swap Trust pursuant to Section 10.01(k) hereof.

(3)

The Class P Certificates will not receive any distributions of interest but will be entitled to all Prepayment Premiums on the Mortgage Loans.

(4)

The Class CE Certificate will be entitled to all Net Monthly Excess Cashflow remaining after distributions pursuant to clauses 5.02(c) (1) through (30) hereof.  For purposes of compliance with the REMIC Provisions, the Class CE Certificates shall represent ownership of a regular interest in the Upper Tier REMIC (the "Class CE Interest"), which shall comprise three components.  The first component has a notional balance equal to the aggregate Stated Principal Balance of the Mortgage Loans.  The interest rate of the Class CE Interest shall be a rate sufficient to cause all net interest from the Mortgage Loans to accrue on the Class CE Interest that is in excess of the amount of interest that accrues on the Certificates (other than the Class CE Certificates).  For any Distribution Date, the Certificate Interest Rate in respect of the Class CE Interest shall be the excess of: (i) the Middle Tier REMIC1 Net WAC Rate over (ii) the product of: (A) two and (B) the weighted average interest rate of the Middle-Tier REMIC1 Regular Interests, where the MT-Q Interest is subject to a cap equal to zero and each remaining Middle-Tier REMIC1 Regular Interest is subject to a cap equal to the Certificate Interest Rate on its Corresponding Class of Certificates, determined by substituting the Middle Tier REMIC1 Net WAC Rate for the Net WAC.  The second component represents the right to receive principal equal to the excess of the aggregate Stated Principal Balance of the Mortgage Loans as of the Cut-off Date over the aggregate Initial Class Principal Amount of each other Class of Certificates (other than the Class P and Class A-R Certificates) as of the Closing Date.  Such principal balance shall not bear interest.  The third component shall be entitled to receive all amounts distributable on the Class MT1-1O interest in Middle-Tier REMIC1 (the "Class I Interest").

As of the Cut-off Date, the Aggregate Stated Principal Balance of the Mortgage Loans was $874,980,419.

The foregoing REMIC structure is intended to cause all of the cash from the Mortgage Loans to flow through to the Upper-Tier REMIC as cash flow on a REMIC regular interest, without creating any shortfall—actual or potential (other than for credit losses) to any REMIC regular interest.  To the extent that the structure is believed to diverge from such intention the parties identifying such ambiguity shall notify the other parties hereto and shall, in accordance with Section 12.03 of this Agreement, attempt to clarify such ambiguity or correct any errors, including drafting errors.

In consideration of the mutual agreements herein contained, the Depositor, the Master Servicer, the Securities Administrator and the Trustee hereby agree as follows:

ARTICLE I

DEFINITIONS

SECTION 1.01

Definitions.  

The following words and phrases, unless the context otherwise requires, shall have the following meanings:

40-year Mortgage Loan: Any Mortgage Loan with an original stated maturity of 480 months.

Accountant : A Person engaged in the practice of accounting who (except when this Agreement provides that an Accountant must be Independent) may be employed by or affiliated with the Depositor or an Affiliate of the Depositor.

Accountant’s Attestation :  The attestation required from an Accountant for each of the Master Servicer, the Securities Administrator, the Custodians and each Servicing Function Participant pursuant to Section 11.07.

Accrual Period : With respect to any Distribution Date and any Class of Certificates, other than the Class A-1-A and the LIBOR Certificates, the calendar month preceding the month in which the Distribution Date occurs and with respect to the Class A-1-A and the LIBOR Certificates, the period from and including the 25th day of the month immediately preceding such Distribution Date (or in the case of the first Distribution Date, November 30, 2006) to and including the 24th day of the month of such Distribution Date.  Interest shall accrue on all Classes of Certificates, other than the LIBOR Certificates, and on all Lower-Tier Interests on the basis of a 360-day year consisting of twelve 30-day months.  Interest shall accrue on the LIBOR Certificates on the basis of a 360-day year consisting of the actual number of days in each Accrual Period.

Acknowledgements : The Assignment, Assumption and Recognition Agreements assigning from the Seller to the Depositor and from the Depositor to the Trustee, for the benefit of the Certificateholders, their respective rights in the Purchase and Servicing Agreements and Servicing Agreements set forth in Exhibit E.

Act : The Securities Act of 1933, as amended.

Additional Collateral : With respect to any Additional Collateral Mortgage Loan, the marketable securities and other acceptable collateral pledged as collateral pursuant to the related pledge agreements.

Additional Collateral Mortgage Loan : Each Mortgage Loan identified as such in the Mortgage Loan Schedule.

Additional Disclosure Notification : As defined in Section 11.01.

Additional Form 10-D Disclosure : As defined in Section 11.01.

Additional Form 10-K Disclosure : As defined in Section 11.02.

Advance : With respect to any Distribution Date and any Mortgage Loan, the payments required to be made by the Servicer of such Mortgage Loan or, if the applicable Servicer fails to make such payments, the Master Servicer, pursuant to this Agreement or the applicable Purchase and Servicing Agreement or Servicing Agreement, as applicable, the amount of any such payment being equal to the aggregate of the payments of principal and interest (net of the applicable Servicing Fee and net of any net income in the case of any REO Property) on the Mortgage Loans that were due on the related Due Date and not received as of the close of business on the related Determination Date, less the aggregate amount of any such delinquent payments that the Master Servicer or the applicable Servicer has determined would constitute Nonrecoverable Advances if advanced.

Adverse REMIC Event : Either (i) loss of status as a REMIC, within the meaning of Section 860D of the Code, for any group of assets identified as a REMIC in the Preliminary Statement to this Agreement, or (ii) imposition of any tax, including the tax imposed under Section 860F(a)(1) on prohibited transactions, and the tax imposed under Section 860G(d) on certain contributions to a REMIC, on any REMIC created hereunder to the extent such tax would be payable from assets held as part of the Trust Fund.

Affiliate : With respect to any specified Person, any other Person controlling or controlled by or under common control with such specified Person.  For the purposes of this definition, "control" when used with respect to any specified Person means the power to direct the management and policies of such Person, directly or indirectly, whether through the ownership of voting securities, by contract or otherwise; and the terms "controlling" and "controlled" have meanings correlative to the foregoing.

Aggregate Collateral Balance :  As of any date of determination, will be equal to the aggregate of the Stated Principal Balances of the Mortgage Loans, except as otherwise provided, as of the last day of the related Due Period.

Aggregate Expense Rate : With respect to any Mortgage Loan, the Servicing Fee Rate, the Master Servicing Fee Rate and any applicable mortgage insurance policy premium payable by any Servicer.

Aggregate Stated Principal Balance : As to any Distribution Date, the aggregate of the Stated Principal Balances for all Mortgage Loans which were outstanding on the Due Date in the month preceding the month of such Distribution Date.

Aggregate Voting Interests : The aggregate of the Voting Interests of all the Certificates under this Agreement.

Agreement : This Pooling and Servicing Agreement and all amendments and supplements hereto.

Allocated Realized Loss Amount : With respect to any Distribution Date and any Class of Senior Certificates, Mezzanine Certificates or Subordinate Certificates, the amount by which (A) any Applied Loss Amounts allocated to such Class of Certificates on any prior Distribution Date pursuant to Section 5.03 exceeds the sum of (B) (i) any additions to the Class Principal Amount pursuant to Section 5.03(d) on any previous Distribution Date (to the extent such addition did not otherwise reduce the Applied Loss Amount allocated on a previous Distribution Date) and (ii) the aggregate of the amounts paid in respect of reimbursement of Unpaid Realized Loss Amounts pursuant to Section 4.05(b)(iii) or Section 5.02(c) on previous Distribution Dates.

Applied Loss Amount :  As to any Distribution Date, an amount equal to the excess, if any, of (i) the aggregate Class Principal Amount of the Senior, Mezzanine and Subordinate Certificates, after giving effect to all Realized Losses incurred on the Mortgage Loans during the related Due Period, distributions of principal on such Distribution Date and any additions to the Class Principal Amounts of the Certificates pursuant to Section 5.03(d) on such Distribution Date over (ii) the Aggregate Stated Principal Balance of the Mortgage Loans for such Distribution Date.

Appraised Value : With respect to any Mortgage Loan, the Appraised Value of the related Mortgaged Property shall be: (i) with respect to a Mortgage Loan other than a Refinancing Mortgage Loan, the lesser of (a) the value of the Mortgaged Property based upon the appraisal made at the time of the origination of such Mortgage Loan and (b) the sales price of the Mortgaged Property at the time of the origination of such Mortgage Loan; and (ii) with respect to a Refinancing Mortgage Loan, the value of the Mortgaged Property based upon the appraisal made at the time of the origination of such Refinancing Mortgage Loan.

Assessment of Compliance :  The certification required from each of the Master Servicer, the Securities Administrator, the Custodians and each Servicing Function Participant pursuant to Section 11.06.

Assignment : The Assignments, each dated as of November 1, 2006 between the Seller and the applicable Custodian, pursuant to which the Seller assigns to the Trustee all of its rights, title and interest under the Custodial Agreements to the extent relating to certain specified mortgage loans.

Assignment of Mortgage : An assignment of the Mortgage, notice of transfer or equivalent instrument, in recordable form, sufficient under the laws of the jurisdiction wherein the related Mortgaged Property is located to reflect the sale of the Mortgage to the Trustee, which assignment, notice of transfer or equivalent instrument may be in the form of one or more blanket assignments covering the Mortgage Loans secured by Mortgaged Properties located in the same jurisdiction, if permitted by law; provided, however , that neither the Trustee nor the Custodians shall be responsible for determining whether any such assignment is in recordable form.

Assignment of Proprietary Lease : With respect to a Cooperative Loan, an assignment of the Proprietary Lease sufficient under the laws of the jurisdiction wherein the related Cooperative Unit is located to reflect the assignment of such Proprietary Lease.

Assignment of Recognition Agreement : With respect to a Cooperative Loan, an assignment of the Recognition Agreement sufficient under the laws of the jurisdiction wherein the related Cooperative Unit is located to reflect the assignment of such Recognition Agreement.

Authenticating Agent : Any authenticating agent appointed by the Trustee pursuant to Section 6.10 until any successor authenticating agent for the Certificates is named, and thereafter  "Authenticating Agent" shall mean any such successor.  The Authenticating Agent shall be Wells Fargo Bank, N.A. for so long as it is acting as Securities Administrator under this Agreement.

Authorized Officer : Any Person who may execute an Officer’s Certificate on behalf of the Depositor.

Available Distribution Amount : With respect to any Distribution Date, the total amount of all cash received from each Servicer on the Mortgage Loans for deposit into the Distribution Account in respect of such Distribution Date, including (1) all scheduled installments of interest (net of the related Servicing Fees) and principal collected on the related Mortgage Loans and due during the Due Period related to such Distribution Date, together with any Advances in respect thereof, (2) all Insurance Proceeds, Liquidation Proceeds and Subsequent Recoveries, in each case for such Distribution Date, (3) all Principal Prepayments, together with any accrued interest thereon, identified as having been received from the Mortgage Loans during the related Prepayment Period, (4) any amounts paid by the Master Servicer and/or received from the Servicers in respect of Prepayment Interest Shortfalls with respect to the Mortgage Loans, (5) the aggregate Purchase Price of all Defective Mortgage Loans purchased from the Trust Fund during the related Prepayment Period and (6) on the Distribution Date on which the Trust Fund is to be terminated pursuant to Article VII hereof, that portion of the Redemption Price in respect of principal, up to the Par Value, minus:

(A)

all related fees, charges and other amounts payable or reimbursable to the Master Servicer, the Securities Administrator, the Custodians or the Trustee under this Agreement or to the related Servicer under the applicable Purchase and Servicing Agreement or Servicing Agreement, as applicable;

(B)

in the case of (2), (3), (4) and (5) above, any related unreimbursed expenses incurred by the related Servicer in connection with a liquidation or foreclosure and any unreimbursed Advances or Servicing Advances due to the Master Servicer or the related Servicer;

(C)

any related unreimbursed Nonrecoverable Advances due to the Master Servicer or the Servicers; and

(D)

in the case of (1) through (4) above, any related amounts collected which are determined to be attributable to a subsequent Due Period or Prepayment Period;

Bankruptcy : As to any Person, the making of an assignment for the benefit of creditors, the filing of a voluntary petition in bankruptcy, adjudication as a bankrupt or insolvent, the entry of an order for relief in a bankruptcy or insolvency proceeding, the seeking of reorganization, arrangement, composition, readjustment, liquidation, dissolution or similar relief, or seeking, consenting to or acquiescing in the appointment of a trustee, receiver or liquidator, dissolution, or termination, as the case may be, of such Person pursuant to the provisions of either the Bankruptcy Code or any other similar state laws.

Bankruptcy Code : The United States Bankruptcy Code of 1986, as amended.

Basic Principal Distribution Amount : With respect to any Distribution Date, the excess of (i) the Principal Remittance Amount for such Distribution Date over (ii) the Overcollateralization Release Amount, if any, for such Distribution Date.

Basis Risk Shortfall Carryover Amounts : With respect to any Distribution Date and the LIBOR Certificates, an amount equal to the sum of (i) the excess of (x) the amount of interest the LIBOR Certificates would have accrued on such Distribution Date had its Certificate Interest Rate for such Distribution Date been equal to the lesser of (a) LIBOR plus the Certificate Margin and (b) 11.500% per annum, over (y) the amount of interest the LIBOR Certificates accrued for such Distribution Date at the Net WAC (adjusted to an actual/360 basis) and (ii) the unpaid portion of any Basis Risk Shortfall Carryover Amount for the LIBOR Certificates from prior Distribution Dates together with interest accrued on such unpaid portion for the most recently ended Accrual Period at the lesser of (a) LIBOR plus the Certificate Margin for the LIBOR Certificates for the related Accrual Period and (b) 11.500% per annum.

Book-Entry Certificates : Beneficial interests in Certificates designated as "Book-Entry Certificates" in this Agreement, ownership and transfers of which shall be evidenced or made through book entries by a Clearing Agency as described in Section 3.09; provided, that after the occurrence of a Book-Entry Termination whereupon book-entry registration and transfer are no longer permitted and Definitive Certificates are to be issued to Certificate Owners, such Book-Entry Certificates shall no longer be "Book-Entry Certificates."  As of the Closing Date, all Classes of Certificates constitute Book-Entry Certificates, other than the Class A-R, Class P and Class CE Certificates.

Book-Entry Termination : The occurrence of any of the following events: (i) the Clearing Agency is no longer willing or able to properly discharge its responsibilities with respect to the Book Entry Certificates, and the Depositor is unable to locate a qualified successor; or (ii) the Depositor at its option advises the Trustee and the Certificate Registrar in writing that it elects to terminate the book-entry system through the Clearing Agency.

Bring-Down Date :  With respect to any Mortgage Loan, the date as of which the applicable Originator makes the representations and warranties with respect to such Mortgage Loan and as specified in the related Purchase and Servicing Agreement or Purchase Agreement, as applicable.

Business Day : Any day other than (i) a Saturday or a Sunday or (ii) a day on which banking institutions in New York, New York or, if other than New York, the cities in which the Corporate Trust Offices of the Trustee and the Securities Administrator are located, are authorized or obligated by law or executive order to be closed.

Certificate : Any one of the certificates signed by the Trustee, or the Securities Administrator on the Trustee’s behalf, and authenticated by the Securities Administrator as Authenticating Agent in substantially the forms attached hereto as Exhibit A.

Certificate Interest Rate : With respect to each Class of Certificates and any Distribution Date, the applicable per annum rate described in the Preliminary Statement hereto.

Certificate Margin : With respect to the Class A-1-B, Class A-2-B and Class A-3-B Certificates and any Distribution Date (i) on or prior to the Initial Optional Purchase Date, 0.08%, 0.13% and 0.17%, respectively and (ii)  after the Initial Optional Purchase Date, 0.16%, 0.26% and 0.34%, respectively.

Certificate Owner : With respect to a Book-Entry Certificate, the Person who is the owner of such Book-Entry Certificate, as reflected on the books of the Clearing Agency, or on the books of a Person maintaining an account with such Clearing Agency (directly or as an indirect participant, in accordance with the rules of such Clearing Agency).

Certificate Principal Amount : With respect to any Certificate, the Certificate Principal Amount as of the Closing Date as reduced by all amounts previously distributed on that Certificate in respect of principal and the principal portion of any Realized Losses previously allocated to that Certificate; provided, however, that the aggregate Certificate Principal Amount of each class of Certificates to which Realized Losses have been allocated shall be increased, sequentially in the priority in which Realized Losses have been allocated, by the amount of Subsequent Recoveries distributed as principal to any related class of Certificates, but not by more than the amount of Realized Losses previously allocated to reduce the Certificate Principal Amount of such class of Certificates.

Certificate Register and Certificate Registrar : The register maintained and the registrar appointed pursuant to Section 3.02.  Wells Fargo Bank, N.A. will act as Certificate Registrar for so long as it is the Securities Administrator under this Agreement.

Certificateholder : The meaning provided in the definition of "Holder."

Certification Parties : has the meaning set forth in Section 11.08.

Certifying Person : has the meaning set forth in Section 11.08.

Chase Originator: CHF and/or JPMCB, as the context requires.

Chase Originator Mortgage Loan :  Each Mortgage Loan originated by a Chase Originator and listed on the Mortgage Loan Schedule.

Chase Originator Purchase and Servicing Agreement :  Each agreement between the Seller and a Chase Originator listed under the heading "Purchase and Servicing Agreements" in Exhibit E hereto, as modified by the related Acknowledgement.

CHF: Chase Home Finance, LLC or its successor in interest.

Civil Relief Act : The Servicemembers Civil Relief Act and any similar state laws.

Class : Collectively, Certificates bearing the same class designation.  In the case of any Lower-Tier REMIC1 or the Middle-Tier REMIC1, the term "Class" refers to all Lower-Tier Interests having the same alphanumeric designation.

Class A-6 and Class A-7 Priority Amount : With respect to the Class A-6 and Class A-7 Certificates and any Distribution Date, the product of (a) the Class A-6 and Class A-7 Priority Percentage, (b) the Class A-6 and Class A-7 Shift Percentage and (c) either (i) on any Distribution Date prior to the Step-Down Date or on which a Trigger Event is in effect, the Principal Distribution Amount for such Distribution Date or (ii) on any Distribution Date on and after the Step-Down Date and on which a Trigger Event is not in effect, the Senior Principal Distribution Amount for such Distribution Date.

Class A-6 and Class A-7 Priority Percentage : With respect to any Distribution Date, the aggregate Class Principal Amount of the Class A-6 and Class A-7 Certificates divided by the aggregate Class Principal Amount of the Senior Certificates, in each case immediately prior to any distributions on that Distribution Date.

Class A-6 and Class A-7 Shift Percentage :  With respect to any Distribution Date, the percentage indicated below:

Class A-R Certificate : The Class A-R Certificate executed by the Securities Administrator on behalf of the Trustee, and authenticated and delivered by the Authenticating Agent, substantially in the form annexed hereto as Exhibit A, and evidencing the ownership of the residual interest in each of the Middle-Tier REMIC1 and the Upper-Tier REMIC formed hereby.

Class A-R Reserve Fund :  The Eligible Account established pursuant to Section 5.02(j).

Class CE Distribution Amount : With respect to any Distribution Date (i) the product of (x) a notional amount, equal to the Aggregate Collateral Balance as of the first day of the month of such Distribution Date (after giving effect to Monthly Payments of principal due on such date), and (y) the Certificate Interest Rate for the Class CE Interest for such Distribution Date as set forth in "The Certificates and the Upper-Tier REMIC" in the Preliminary Statement herein, less (ii) distributions made pursuant to Section 5.02(c) (1)-(30) on such Distribution Date.

Class P Reserve Fund :  The Eligible Account established pursuant to Section 5.02(g).

Class Principal Amount : With respect to each Class of Certificates, the aggregate of the Certificate Principal Amounts of all Certificates of such Class at the date of determination.  With respect to any Lower-Tier Interest, the initial Class Principal Amount as shown or described in the table set forth in the Preliminary Statement for such REMIC, as reduced by principal distributed with respect to such Lower-Tier Interest and Realized Losses allocated to such Lower-Tier Interest at the date of determination.

Clearing Agency : An organization registered as a "clearing agency" pursuant to Section 17A of the Securities Exchange Act of 1934, as amended.  As of the Closing Date, the Clearing Agency shall be The Depository Trust Company.

Clearing Agency Participant : A broker, dealer, bank, other financial institution or other Person for whom from time to time a Clearing Agency effects book-entry transfers and pledges of securities deposited with the Clearing Agency.

Closing Date : November 29, 2006.

Code : The Internal Revenue Code of 1986, as amended, and as it may be further amended from time to time, any successor statutes thereto, and applicable U.S. Department of Treasury regulations issued pursuant thereto in temporary or final form.

Commission :  The Securities and Exchange Commission.

Compensating Interest Payment :  As to any Distribution Date, the lesser of (1) the aggregate Master Servicing Fee for such date, and (2) any Prepayment Interest Shortfall for such date, to the extent that Prepayment Interest Shortfalls relating to such Distribution Date are required to be paid by the Servicers pursuant to the Purchase and Servicing Agreements or Servicing Agreements, as applicable, as amended by the Acknowledgements, but not actually paid by the Servicers.

Consent : A document executed by the Cooperative Corporation (i) consenting to the sale of the Cooperative Unit to the Mortgagor and (ii) certifying that all maintenance charges relating to the Cooperative Unit have been paid.

Cooperative Corporation : The entity that holds title (fee or an acceptable leasehold estate) to the real property and improvements constituting the Cooperative Property and which governs the Cooperative Property, which Cooperative Corporation must qualify as a Cooperative Housing Corporation under Section 216 of the Code.

Cooperative Loan : Any Mortgage Loan secured by Cooperative Shares and a Proprietary Lease.

Cooperative Property : The real property and improvements owned by the Cooperative Corporation, that includes the allocation of individual dwelling units to the holders of the shares of the Cooperative Corporation.

Cooperative Shares : Shares issued by a Cooperative Corporation.

Cooperative Unit : With respect to any Cooperative Mortgage Loan, a specific unit in a Cooperative Property.

Corporate Trust Office : With respect to the Trustee, the corporate trust office of the Trustee located at 209 South LaSalle Street, Suite 300, Chicago, Illinois 60604, Attention: Structured Finance Trust Services, J.P. Morgan Alternative Loan Trust 2006-S4, or at such other address as the Trustee may designate from time to time by notice to the Certificateholders, the Depositor, the Master Servicer and the Securities Administrator or the principal corporate trust office of any successor Trustee.  With respect to the Certificate Registrar and presentment of Certificates for registration of transfer, exchange or final payment, Wells Fargo Bank, N.A., Sixth Street and Marquette Avenue, Minneapolis, Minnesota 55479, Attention: Corporate Trust, J.P. Morgan Alternative Loan Trust 2006-S4.

Corresponding Certificates : With respect to each Lower-Tier Interest, the Certificates so designated in the Preliminary Statement.

Countrywide :  Countrywide Home Loans, Inc., or any successor in interest.

Countrywide Servicing :  Countrywide Home Loans Servicing L.P. or any successor in interest.

Countrywide Mortgage Loan :  Each Mortgage Loan originated by Countrywide and listed on the Mortgage Loan Schedule.

Countrywide Purchase and Servicing Agreement :  Each agreement between the Seller and Countrywide or Countrywide Servicing listed under the heading "Purchase and Servicing Agreements" in Exhibit E hereto, as modified by the related Acknowledgement.

Current Interest : With respect to each Class of Certificates entitled to interest and any Distribution Date, the aggregate amount of interest accrued at the applicable Certificate Interest Rate during the related Accrual Period on the Class Principal Amount of such Class, as applicable, immediately prior to such Distribution Date.

Custodial Accounts : Each custodial account (other than an Escrow Account) established and maintained by a Servicer pursuant to a Purchasing and Servicing Agreement or Servicing Agreement, as applicable.

Custodial Agreements : The Custodial Agreements, listed in Exhibit F hereof, as each such agreement may be amended or supplemented from time to time as permitted hereunder.

Custodian : A Person who is at anytime appointed by the Trustee and the Depositor as a custodian of the Mortgage Documents and the Trustee Mortgage Files.  The initial Custodians are  JPMorgan Chase Bank, N.A. and The Bank of New York Trust Company, N.A.   Any corporation or association into which a Custodian may be merged or converted or with which it may be consolidated, or any corporation or association resulting from any merger, conversion or consolidation to which such Custodian shall be a party, or any corporation or association to which all or substantially all of the corporate trust business of such Custodian may be sold or otherwise transferred, shall be the successor to such Custodian hereunder without any further act.

Cut-off Date : November 1, 2006.

CTX : CTX Mortgage Company, LLC or any successor in interest.

CTX Mortgage Loan : Each Mortgage Loan originated by CTX and listed on the Mortgage Loan Schedule.

CTX Purchase Agreement : Each agreement between the Seller and CTX listed under the heading "Purchase Agreements" in Exhibit E hereto.

Cut-off Date Balance : As to any Mortgage Loan, the Stated Principal Balance thereof as of the close of business on the related Cut-off Date.

Debt Service Reduction : With respect to any Mortgage Loan, a reduction by a court of competent jurisdiction in a proceeding under the Bankruptcy Code in the Scheduled Payment for such Mortgage Loan which became final and non-appealable, except such a reduction resulting from a Deficient Valuation or any reduction that results in a permanent forgiveness of principal.

Defective Mortgage Loan : The meaning specified in Section 2.05.

Deficient Valuation : With respect to any Mortgage Loan, a valuation of the related Mortgaged Property by a court of competent jurisdiction in an amount less than the then outstanding indebtedness under the Mortgage Loan, or any reduction in the amount of principal to be paid in connection with any Scheduled Payment that results in a permanent forgiveness of principal, which valuation or reduction results from an order of such court which is final and non-appealable in a proceeding under the Bankruptcy Code.

Deficient Valuation Reduction : The difference between the principal balance of the Mortgage Loan outstanding immediately prior to such Deficient Valuation and the principal balance of the Mortgage Loan as reduced by the Deficient Valuation.

Definitive Certificate : A Certificate of any Class issued in definitive, fully registered, certificated form.

Deleted Mortgage Loan : A Mortgage Loan which is repurchased, or replaced or to be replaced with a Replacement Mortgage Loan.

Delinquent : Any Mortgage Loan with respect to which the Scheduled Payment due on a Due Date is not received.

Depositor : J.P. Morgan Acceptance Corporation I, a Delaware corporation having its principal place of business in New York, or its successors in interest.

Determination Date : With respect to each Distribution Date and Servicer, the date specified as such in the related Purchase and Servicing Agreement or Servicing Agreement, as applicable.

Disqualified Organization : A "disqualified organization" as defined in Section 860E(e)(5) of the Code.

Distribution Account : The separate Eligible Account created and maintained by the Securities Administrator, on behalf of the Trustee, pursuant to Section 4.01.  Funds in the Distribution Account (exclusive of any earnings on investments made with funds deposited in the Distribution Account) shall be held in trust for the Trustee and the Certificateholders for the uses and purposes set forth in this Agreement.

Distribution Account Deposit Date :  The 18th day of each calendar month after the initial issuance of the Certificates or, if such 18th day is not a Business Day, the immediately preceding Business Day, commencing in December 2006.

Distribution Date : The 25th day of each month or, if such 25th day is not a Business Day, the next succeeding Business Day, commencing in December 2006.

Due Date : With respect to any Mortgage Loan, the date on which a Scheduled Payment is due under the related Mortgage Note as indicated in the applicable Purchase and Servicing Agreement.

Due Period : As to any Distribution Date, the period beginning on the second day of the month preceding the month of such Distribution Date, and ending on the first day of the month of such Distribution Date.

Early Termination Date :  As defined in the Swap Agreement.

Eligible Account : Any of (i) an account or accounts maintained with a federal or state chartered depository institution or trust company the short-term unsecured debt obligations of which (or, in the case of a depository institution or trust company that is the principal subsidiary of a holding company, the debt obligations of such holding company) have the highest short-term ratings of each Rating Agency at the time any amounts are held on deposit therein, or (ii) an account or accounts in a depository institution or trust company in which such accounts are insured by the FDIC or the SAIF (to the limits established by the FDIC or the SAIF) and the uninsured deposits in which accounts are otherwise secured such that, as evidenced by an Opinion of Counsel delivered to the Trustee and to each Rating Agency, the Certificateholders have a claim with respect to the funds in such account or a perfected first priority security interest against any collateral (which shall be limited to Permitted Investments) securing such funds that is superior to claims of any other depositors or creditors of the depository institution or trust company in which such account is maintained, or (iii) a trust account or accounts maintained with the trust department of a federal or state chartered depository institution or trust company, acting in its fiduciary capacity or (iv) any other account acceptable to each Rating Agency, as evidenced by a signed writing delivered by each Rating Agency. Eligible Accounts may bear interest, and may include, if otherwise qualified under this definition, accounts maintained with the Trustee, the Paying Agent, the Securities Administrator or the Master Servicer.

ERISA : The Employee Retirement Income Security Act of 1974, as amended.

ERISA-Qualifying Underwriting : A best efforts or firm commitment underwriting or private placement that meets the requirements of an Underwriter’s Exemption.

ERISA-Restricted Certificate : The Class A-7, Class M-1, Class M-2, Class M-3, Class M-4, Class M-5, Class M-6, Class B-1, Class A-R,  Class CE and the Class P Certificates, and any Certificate that does not satisfy the applicable rating requirement under the Underwriter’s Exemption and the Uncertificated Interest.

ERISA-Restricted Swap Certificates : The Senior Certificates, other than the Class A-7 Certificates.

Escrow Account : As defined in Article I of each Purchase and Servicing Agreement or Servicing Agreement, as applicable.

Estoppel Letter : A document executed by the Cooperative Corporation certifying, with respect to a Cooperative Unit, (i) the appurtenant Proprietary Lease will be in full force and effect as of the date of issuance thereof, (ii) the related stock certificate was registered in the Mortgagor’s name and the Cooperative Corporation has not been notified of any lien upon, pledge of, levy of execution on or disposition of such stock certificate, and (iii) the Mortgagor is not in default under the appurtenant Proprietary Lease and all charges due the Cooperative Corporation have been paid.

Event of Default : Any one of the conditions or circumstances enumerated in Section 6.14.

Exchange Act : The Securities Exchange Act of 1934, as amended, and the rules and regulations thereunder.

Fair Market Value : An amount equal to the fair market value of all of the property of the Trust Fund as agreed upon between the Master Servicer and a majority of the holders of the Uncertificated Interest; provided, however, that if the Master Servicer and a majority of the holders of the Uncertificated Interest do not agree upon the fair market value of all of such property, the Master Servicer, or an agent appointed by the Master Servicer, shall solicit bids for all of such property, until it has received three bids, and the Fair Market Value shall be equal to the highest of such three bids.

Fannie Mae : The entity formerly known as the Federal National Mortgage Association, a federally chartered and privately owned corporation organized and existing under the Federal National Mortgage Association Charter Act, or any successor thereto.

FDIC : The Federal Deposit Insurance Corporation or any successor thereto.

FHLMC : The Federal Home Loan Mortgage Corporation, a corporate instrumentality of the United States created and existing under Title III of the Emergency Home Finance Act of 1970, as amended, or any successor thereto.

Fifth Third:  Fifth Third Mortgage Corporation, or any successor in interest.

Fifth Third Mortgage Loan:  Each Mortgage Loan originated by Fifth Third and listed on the Mortgage Loan Schedule.

Fifth Third Purchase and Servicing Agreement :  Each agreement between the Seller and Fifth Third, listed under the heading "Purchase and Servicing Agreements" in Exhibit E hereto.

Fitch Ratings : Fitch, Inc., or any successor in interest.

Fixed Pass-Through Rate : For any Class of Fixed Rate Certificates and any Distribution Date on or prior to the Initial Optional Purchase Date, the related Initial Interest Rate.  For any Class of Fixed Rate Certificates and any Distribution Date after the Initial Optional Purchase Date, the related Initial Interest Rate plus (a)  0.500%, with respect each Class of Senior Certificates and (b) 0.250%, with respect each Class of Mezzanine and Subordinate Certificates..

Fixed-Rate Certificates : The Certificates, other than the LIBOR, Class P, Class CE and Class A-R Certificates.

Fixed Swap Payment :  With respect to any Distribution Date, an amount equal to the product of 5.044% and the Swap Agreement Notional Amount for such Distribution Date, multiplied by a fraction, the numerator of which is 30 (except with respect to the first Distribution Date, on which the numerator is 25) and the denominator of which is 360.

Floating Swap Payment :  With respect to any Distribution Date, an amount equal to the product of (x) one-month LIBOR (as determined pursuant to the Swap Agreement), (y) the Swap Agreement Notional Amount for that Distribution Date and (z) a fraction, the numerator of which is the actual number of days elapsed from the previous Distribution Date to but excluding the current Distribution Date (or, for the first Distribution Date, the actual number of days elapsed from the Closing Date to but excluding the first Distribution Date), and the denominator of which is 360.

Form 8-K Disclosure Information : As defined in Section 11.03.

Global Securities : The global certificates representing the Book-Entry Certificates.

GreenPoint : GreenPoint Mortgage Funding, Inc. or any successor in interest.

GreenPoint Mortgage Loan : Each Mortgage Loan originated by GreenPoint and listed on the Mortgage Loan Schedule.

GreenPoint Purchase Agreement : Each agreement between the Seller and GreenPoint listed under the heading "Purchase Agreements" in Exhibit E hereto, as modified by the related Acknowledgement.

Holder or Certificateholder : The registered owner of any Certificate or Uncertificated Interest as recorded on the books of the Certificate Registrar except that, solely for the purposes of taking any action or giving any consent pursuant to this Agreement, any Certificate registered in the name of the Depositor, the Trustee, the Master Servicer, the Securities Administrator and any Servicer, or any Affiliate thereof shall be deemed not to be outstanding in determining whether the requisite percentage necessary to effect any such consent has been obtained, except that, in determining whether the Trustee shall be protected in relying upon any such consent, only Certificates which a Responsible Officer of the Trustee knows to be so owned shall be disregarded.  The Trustee may request and conclusively rely on certifications by the Depositor, the Master Servicer, the Securities Administrator or any Servicer in determining whether any Certificates are registered to an Affiliate of the Depositor, the Master Servicer, the Securities Administrator or any Servicer.

HUD : The United States Department of Housing and Urban Development, or any successor thereto.

Independent : When used with respect to any Accountant, a Person who is "independent" within the meaning of Rule 2-01(B) of the Securities and Exchange Commission’s Regulation S-X.  Independent means, when used with respect to any other Person, a Person who (A) is in fact independent of another specified Person and any Affiliate of such other Person, (B) does not have any material direct or indirect financial interest in such other Person or any Affiliate of such other Person, (C) is not connected with such other Person or any Affiliate of such other Person as an officer, employee, promoter, underwriter, trustee, partner, director or Person performing similar functions and (D) is not a member of the immediate family of a Person defined in clause (B) or (C) above.

Indymac : IndyMac Bank, F.S.B.

Indymac Mortgage Loan : Each Mortgage Loan originated by Indymac and listed on the Mortgage Loan Schedule.

Indymac Purchase and Servicing Agreement : Each agreement between the Seller and Indymac listed under the heading "Purchase and Servicing Agreements" in Exhibit E hereto, as modified by the related Acknowledgement.

Initial Interest Rate : For any Class of Fixed Rate Certificates, the rate set forth opposite such Class in the table below:

Initial Optional Purchase Date :  The first Distribution Date following the date on which the Aggregate Collateral Balance is equal to or less than 10.00% of the Aggregate Collateral Balance as of the Cut-off Date.

Insurance Policy : With respect to any Mortgage Loan, any insurance policy, including all names and endorsements thereto in effect, including any replacement policy or policies for any Insurance Policies.

Insurance Proceeds : Proceeds paid by any Insurance Policy (excluding proceeds required to be applied to the restoration and repair of the related Mortgaged Property or released to the Mortgagor), in each case other than any amount included in such Insurance Proceeds in respect of Insured Expenses and the proceeds from any Limited Purpose Surety Bond.

Insured Expenses : Expenses covered by an Insurance Policy or any other insurance policy with respect to the Mortgage Loans.

Interest Distribution Amount : With respect to each Distribution Date and each Class of Certificates entitled to distributions of interest, an amount equal to the amount of interest accrued during the related Accrual Period at the related Certificate Interest Rate on the Class Principal Amount of such Class of Certificates immediately prior to such Distribution Date, in each case, reduced by any Net Interest Shortfalls allocated to such Class of Certificates.  On any Distribution Date, Net Interest Shortfalls shall first reduce the Net Monthly Excess Cashflow and then will be allocated among the Senior, Mezzanine and Subordinate Certificates in reduction of their respective Interest Distribution Amounts, pro rata, based on the respective Interest Distribution Amounts for such Distribution Date without giving effect to Net Interest Shortfalls.

Interest Remittance Amount : With respect to any Distribution Date is equal to the sum of (i) interest received or advanced with respect to the Mortgage Loans and (ii) Compensating Interest paid by the Servicer or Master Servicer with respect to the Mortgage Loans.

Interest Shortfall : As to any Class of Certificates and any Distribution Date, the amount by which the Interest Distribution Amount for such Class on all prior Distribution Dates exceeds amounts distributed in respect thereof to such Class on prior Distribution Dates.

Intervening Assignments : The original intervening assignments of the Mortgage, notices of transfer or equivalent instrument.

ISDA :  International Swaps and Derivatives Association, Inc.

ISDA Master Agreement :  An ISDA Master Agreement (Multicurrency-Cross Border) in the form published by ISDA in 1992 including the schedule thereto.

Item 1123 Certification :  The certification required from each of the Master Servicer, the Securities Administrator and each Servicing Function Participant pursuant to Section 11.05.

JPMCB : JPMorgan Chase Bank, National Association, or its successors in interest.

Latest Possible Maturity Date : The Distribution Date occurring in the month three years after the latest scheduled maturity date for any Mortgage Loan.

LIBOR : For any Distribution Date (and the related Accrual Period), the London Interbank Offered Rate for one-month United States dollar deposits quoted on Telerate Page 3750 as of 11:00 A.M., London time, on the related LIBOR Determination Date relating.  If such rate does not appear on such page (or such other page as may replace that page on that service, or if such service is no longer offered, such other service for displaying LIBOR or comparable rates as may be reasonably selected by the Securities Administrator), the rate will be the Reference Bank Rate.  If no such quotations can be obtained and no Reference Bank Rate is available, LIBOR will be LIBOR applicable to the preceding Distribution Date.  On the LIBOR Determination Date immediately preceding each Distribution Date, the Securities Administrator shall determine LIBOR for the Accrual Period commencing on such Distribution Date and inform the Trustee, the Master Servicer and each Servicer of such rate.

LIBOR Business Day : Any day on which banks in London, England and the City of New York are open and conducting transactions in foreign currency and exchange.

LIBOR Certificates : The Class A-1-B, Class A-2-B and Class A-3-B Certificates.

LIBOR Determination Date : The second LIBOR Business Day prior to the first day of the related Accrual Period.

Liquidated Mortgage Loan : With respect to any Distribution Date, a defaulted Mortgage Loan (including any REO Property) which was liquidated in the calendar month preceding the month of such Distribution Date and as to which the related Servicer has certified (in accordance with its Purchase and Servicing Agreement or Servicing Agreement, as applicable) that it has received all amounts it expects to receive in connection with the liquidation of such Mortgage Loan including the final disposition of an REO Property.

Liquidation Proceeds : Amounts, including Insurance Proceeds, received in connection with the partial or complete liquidation of defaulted Mortgage Loans (including, with respect to any Additional Collateral Mortgage Loans, all proceeds related to the Additional Collateral), whether through trustee’s sale, foreclosure sale or otherwise or amounts received in connection with any condemnation or partial release of a Mortgaged Property and any other proceeds received in connection with an REO Property.

Loan-To-Value Ratio : With respect to any Mortgage Loan and as to any date of determination, the fraction (expressed as a percentage) the numerator of which is the principal balance of the related Mortgage Loan at the date of determination and the denominator of which is the Appraised Value of the related Mortgaged Property.

Lower-Tier Interest : Any one of the interests in any Lower-Tier REMIC as described in the Preliminary Statement.

Lower-Tier REMIC1 : As described in the Preliminary Statement.

Master Servicer : Wells Fargo Bank, N.A. a national banking association organized under the laws of the United States and any Person succeeding as master servicer hereunder or any successor in interest, or if any successor master servicer shall be appointed as herein provided, then such successor master servicer.

Master Servicing Fee :  With respect to any Distribution Date, an amount equal to 1/12 ^th of the product of (1) the principal balance of the Mortgage Loans as of the first day of the related Due Period and (2) the Master Servicing Fee Rate with respect to the Mortgage Loans.  The Master Servicer also may be entitled to a portion of the investment earnings on amounts on deposit in the Distribution Account payable under the terms hereof.

Master Servicing Fee Rate :  With respect to the Mortgage Loans, a per annum rate equal to 0.0115%.

MERS : Mortgage Electronic Registration Systems, Inc., a corporation organized and existing under the laws of the State of Delaware, or any successor to Mortgage Electronic Registration Systems, Inc.

MERS Mortgage Loan : Any Mortgage Loan registered with MERS on the MERS® System.

MERS® System : The system of recording transfers of mortgages electronically maintained by MERS.

Mezzanine Certificates :  The Class M-1, Class M-2 Class M-3, Class M-4, Class M-5 and Class M-6 Certificates.

Mezzanine Class Principal Distribution Amount :  With respect to the any class of Mezzanine Certificates and Distribution Date, an amount equal to the excess of (x) the sum of (1) the Class Principal Amount of such class of Mezzanine Certificates immediately prior to such Distribution Date, (2) the aggregate Class Principal Amount of the Senior Certificates (after taking into account the payment of the Senior Principal Distribution Amount on such Distribution Date), (3) the aggregate Class Principal Amount of each other class of Mezzanine Certificates with a lower alpha-numerical class designation (after taking into account the payment of the related Mezzanine Class Principal Distribution Amounts on such Distribution Date) over (y) the lesser of (A) the product of (1) 100%, minus the related Targeted Credit Enhancement Percentage and (2) the Aggregate Collateral Balance as of the last day of the related Due Period and (B) the Aggregate Collateral Balance as of the last day of the related Due Period minus the Overcollateralization Floor.

Middle-Tier Interest :  Any one off the interests in the Middle-Tier REMIC1 as described in the Preliminary Statement.

Middle-Tier REMIC1 :  As described in the Preliminary Statement.

MIN : The mortgage identification number for any MERS Mortgage Loan.

MOM Loan : Any Mortgage Loan as to which MERS is acting as mortgagee, solely as nominee for the originator of such Mortgage Loan and its successors and assigns.

Moody’s :  Moody’s Investors Service, Inc., or any successor in interest.

Mortgage : A mortgage, deed of trust or other instrument encumbering a fee simple interest in real property securing a Mortgage Note, together with improvements thereto.

Mortgage Documents : With respect to each Mortgage Loan, the mortgage documents required to be delivered to the applicable Custodian pursuant to the related Custodial Agreement.

Mortgage Loan : A Mortgage and the related Mortgage Note conveyed, transferred, sold, assigned to or deposited with the Trustee pursuant to Section 2.01 (including any Replacement Loan and REO Property), including without limitation, each Mortgage Loan listed on the Mortgage Loan Schedule, as amended from time to time.

Mortgage Loan Schedule : The schedule attached hereto as Schedule A, which shall identify each Mortgage Loan, as such schedule may be amended by the Depositor or a Servicer from time to time (with copies of such amended schedule to be delivered promptly by the Depositor or such Servicer to the Securities Administrator, the Master Servicer, the Trustee and the Custodians) to reflect the addition of Replacement Mortgage Loans to, or the deletion of Deleted Mortgage Loans from, the Trust Fund.  Such schedule shall, among other things designate the Servicer servicing such Mortgage Loan and the applicable Servicing Fee Rate.

Mortgage Note : The original executed note or other evidence of the indebtedness of a Mortgagor secured by a Mortgage under a Mortgage Loan.

Mortgaged Property : The underlying property securing a Mortgage Loan which, with respect to a Cooperative Loan, is the related Cooperative Shares and Proprietary Lease.

Mortgage Rate : As to any Mortgage Loan, the annual rate of interest borne by the related Mortgage Note.

Mortgagor : The obligor on a Mortgage Note.

National City: National City Mortgage Co., or any successor in interest.

National City Mortgage Loan:  Each Mortgage Loan originated by National City and listed on the Mortgage Loan Schedule.

National City Purchase and Servicing Agreement :  Each agreement between the Seller and National City listed under the heading "Purchase and Servicing Agreements" in Exhibit E hereto, as modified by the related Acknowledgement.

Net Interest Shortfall :  With respect to any Distribution Date, the sum of (i) Net Prepayment Interest Shortfalls for that Distribution Date and (ii) aggregate Relief Act Shortfalls for the Mortgage Loans for that Distribution Date.

Net Liquidation Proceeds : With respect to any Liquidated Mortgage Loan or any other disposition of related Mortgaged Property, the related Liquidation Proceeds net of Advances, Servicer Advances, Servicing Fees and any other accrued and unpaid servicing fees received and retained in connection with the liquidation of such Mortgage Loan or Mortgaged Property.

Net Monthly Excess Cashflow : With respect to any Distribution Date, an amount equal to the sum of (A) any Overcollateralization Release Amount and (B) the positive excess of (x) the Available Distribution Amount for such Distribution Date over (y) the sum for such Distribution Date of (i) the Interest Distribution Amounts for the Certificates, including Unpaid Interest Shortfalls for the Senior Certificates, distributed pursuant to Section 5.02(a), (ii) any Net Swap Payment payable to the Swap Provider and any Swap Termination Payments payable to the Swap Provider, other than a Swap Termination Payment resulting from a Swap Provider Trigger Event on such Distribution Date and (iii) the Principal Remittance Amount.

Net Mortgage Rate : With respect to any Mortgage Loan and any Distribution Date, the related Mortgage Rate reduced by the Aggregate Expense Rate for such Mortgage Loan.

Net Prepayment Interest Shortfall : With respect to any Distribution Date, the amount by which any Prepayment Interest Shortfall for such date exceeds the amount payable by the related Servicer, or the Master Servicer (if the related Servicer fails to pay such amount) and/or in respect of such shortfall.

Net Swap Payment : With respect to any Distribution Date, the positive difference between the Fixed Swap Payment and the Floating Swap Payment for such Distribution Date.

Net WAC :  As to any Distribution Date, the excess of (a) the weighted average of the Net Mortgage Rates of the Mortgage Loans as of the first day of the calendar month preceding the month of such Distribution Date, weighted on the basis of their outstanding Stated Principal Balances (after giving effect to the Scheduled Payments due on or before such date and Principal Prepayments received prior to such date) at such time; including, with respect to the first Distribution Date, any Mortgage Loans that were removed from Trust Fund prior to the Closing Date with the characteristics as set forth in the table in Section 5.02(h) over (b) the fraction, expressed as a percentage, the numerator of which is 12 multiplied by the amount of any Net Swap Payment and Swap Termination Payment (other than a Swap Termination Payment resulting from a Swap Provider Trigger Event) owed to the Swap Provider for such Distribution Date and the denominator of which is the aggregate Stated Principal Balance of the Mortgage Loans as of the first day of the related Due Period.  

Net WAC Shortfall Carryover Amount :  With respect to any Distribution Date and each class of Fixed-Rate Certificates, an amount equal to the sum of (i) the excess of (x) the amount of interest such class of Certificates would have accrued on such Distribution Date had its Certificate Interest Rate for such Distribution Date been equal to the Fixed Pass-Through Rate for such class of Certificates , over (y) the amount of interest such class of Certificates accrued for such Distribution Date at the Net WAC and (ii) the unpaid portion of any Net WAC Shortfall Carryover Amount for such class of Certificates from prior Distribution Dates together with interest accrued on such unpaid portion for the most recently ended Accrual Period at the Fixed Pass-Through Rate for such class of Certificates.

Non-Book-Entry Certificate : Any Certificate other than a Book-Entry Certificate.

Non-permitted Foreign Holder : As defined in Section 3.03(f).

Non-U.S. Person : Any person other than a "United States person" within the meaning of Section 7701(a)(30) of the Code.

Nonrecoverable Advance : Any portion of an Advance or Servicer Advance previously made or proposed to be made by the related Servicer, or the Master Servicer (if the related Servicer fails to pay such amount) (as certified in an Officer’s Certificate of such Servicer or the Master Servicer), which in the good faith judgment of such party, shall not be ultimately recoverable by such party from the related Mortgagor, related Liquidation Proceeds or otherwise.

Offering Document : With respect to the Offered Certificates, the Prospectus.  With respect to the Class P and Class CE Certificates, the Private Placement Memorandum.

Officer’s Certificate : A certificate signed by two Authorized Officers of the Depositor or the Chairman of the Board, any Vice Chairman, the President, any Vice President or any Assistant Vice President or Trust Officer of the Master Servicer or the Securities Administrator, and in each case delivered to the Trustee.

Officer’s Certificate of a Servicer : A certificate (i) signed by the Chairman of the Board, the Vice Chairman of the Board, the President, a Managing Director, a Vice President (however denominated), an Assistant Vice President, the Treasurer, the Secretary, or one of the Assistant Treasurers or Assistant Secretaries of a Servicer, or (ii) if provided for herein, signed by a Servicing Officer, as the case may be, and delivered to the Trustee or the Securities Administrator, as required hereby.

Opinion of Counsel : A written opinion of counsel, reasonably acceptable in form and substance to the Trustee, the Securities Administrator or the Master Servicer, as required hereby, and who may be in-house or outside counsel to the Depositor, the Master Servicer, the Securities Administrator or the Trustee but which must be Independent outside counsel with respect to any such opinion of counsel concerning the transfer of any Residual Certificate or concerning certain matters with respect to the Employee Retirement Income Security Act of 1974, as amended ("ERISA"), or the taxation, or the federal income tax status, of each REMIC created hereby.

Originator : Each of the Chase Originators, CTX, Countrywide, Fifth Third, GreenPoint, Indymac, National City, PHH, SunTrust and WMMSC, as applicable.

Overcollateralization Deficiency Amount : With respect to any Distribution Date, the excess, if any, of (a) the Overcollateralization Target Amount applicable to such Distribution Date over (b) the Overcollateralized Amount applicable to such Distribution Date (assuming that 100% of the Principal Remittance Amount is applied as a payment of principal on such Distribution Date).

Overcollateralization Floor :  With respect to any Distribution Date prior to December 2026, the product of (i) 0.50% and (ii) the aggregate Stated Principal Balance of the Mortgage Loans as of the Cut-off Date.   With respect to any Distribution Date on or after December 2026, the greater of (a) the product of (i) 0.50% and (ii) the aggregate Stated Principal Balance of the Mortgage Loans as of the Cut-off Date and (b) the sum of (i) the aggregate Stated Principal Balance of the 40-year Mortgage Loans as of the end of the related Due Period and (ii) the product of (x) 0.10% and (y) the aggregate Stated Principal Balance of the Mortgage Loans as of the Cut-off Date

Overcollateralization Increase Amount : With respect to any Distribution Date, the lesser of (a) the Overcollateralization Deficiency Amount as of such Distribution Date and (b) Net Monthly Excess Cash Flow available for distribution on that Distribution Date pursuant to Section 5.02(c)(1).

Overcollateralization Release Amount: With respect to any Distribution Date, the lesser of (x) the Principal Remittance Amount for such Distribution Date and (y) the excess, if any, of (1) the Overcollateralized Amount for such Distribution Date over (2) the Overcollateralization Target Amount for such Distribution Date.

Overcollateralization Target Amount : With respect to any to any Distribution Date (1) prior to the Step-Down Date, 1.00% of the Aggregate Collateral Balance as of the Cut-off Date, (2) on or after the Step-Down Date, provided a Trigger Event is not in effect, the greater of (x) 2.00% of the Aggregate Collateral Balance as of the last day of the related Due Period and (y) the Overcollateralization Floor, and (3) on or after the Step-Down Date, if a Trigger Event is in effect, the Overcollateralization Target Amount for the immediately preceding Distribution Date.

Overcollateralized Amoun t: As of any Distribution Date, the excess, if any, of (a) the Aggregate Collateral Balance as of the last day of the related Due Period for such Distribution Date over (b) the sum of the aggregate Class Principal Amounts of the Senior, Mezzanine and Subordinate Certificates as of such Distribution Date (assuming 100% of the Principal Remittance Amount is applied as a principal payment on such Distribution Date).

Par Value :  An amount equal to the sum of (i) 100% of the Stated Principal Balance of each related Mortgage Loan (other than in respect of REO Property) plus accrued and unpaid interest thereon from the date to which such interest was paid or advanced at the sum of the applicable Mortgage Rate, to but not including the Due Date in the month of the final Distribution Date and (ii) with respect to any related REO Property, the appraised value of any REO Property as determined by the higher of two appraisals completed by two independent appraisers selected by the Depositor at the expense of the Depositor, (iii) any Net Swap Payment payable to the Swap Provider and any Swap Termination Payments payable to the Swap Provider, other than a Swap Termination Payment resulting from a Swap Provider Trigger Event and (iv) any related remaining unreimbursed Advances and Servicing Advances and unpaid Servicing Fees and Master Servicing Fees, and any other amounts payable to the Trustee and Securities Administrator, in each case relating to the related Mortgage Loans.

Paying Agent : Any paying agent appointed pursuant to Section 3.08.  The Paying Agent shall be Wells Fargo Bank, N.A., for so long as it is acting as Securities Administrator under this Agreement.

PCAOB : The Public Company Accounting Oversight Board.

Percentage Interest : With respect to any Certificate, its percentage interest in the undivided beneficial ownership interest in the Trust Fund evidenced by all Certificates of the same Class as such Certificate.  With respect to any Certificate other than the Class A-R or Class P Certificate, the Percentage Interest evidenced thereby shall equal the initial Certificate Principal Amount thereof divided by the initial Class Principal Amount of all Certificates of the same Class.  With respect to each of the Class A-R and Class P Certificates, the Percentage Interest evidenced thereby shall be as specified on the face thereof, or otherwise, be equal to 100%.

Permitted Investments : At any time, any one or more of the following obligations and securities:

(i)

obligations of the United States or any agency thereof, provided that such obligations are backed by the full faith and credit of the United States;

(ii)

general obligations of or obligations guaranteed by any state of the United States or the District of Columbia receiving the highest long-term debt rating of each Rating Agency, or such lower rating as shall not result in the downgrading or withdrawal of the ratings then assigned to the Certificates by the Rating Agencies, as evidenced by a signed writing delivered by each Rating Agency;

(iii)

commercial or finance company paper which is then receiving the highest commercial or finance company paper rating of each Rating Agency rating such paper, or such lower rating as shall not result in the downgrading or withdrawal of the ratings then assigned to the Certificates by the Rating Agencies, as evidenced by a signed writing delivered by each Rating Agency;

(iv)

certificates of deposit, demand or time deposits, or bankers’ acceptances issued by any depository institution or trust company incorporated under the laws of the United States or of any state thereof and subject to supervision and examination by federal and/or state banking authorities, provided that the commercial paper and/or long-term unsecured debt obligations of such depository institution or trust company (or in the case of the principal depository institution in a holding company system, the commercial paper or long-term unsecured debt obligations of such holding company, but only if Moody’s is not the applicable Rating Agency) are then rated one of the two highest long-term and the highest short-term ratings of each Rating Agency for such securities, or such lower ratings as shall not result in the downgrading or withdrawal of the ratings then assigned to the Certificates by the Rating Agencies, as evidenced by a signed writing delivered by each Rating Agency;

(v)

demand or time deposits or certificates of deposit issued by any bank or trust company or savings institution to the extent that such deposits are fully insured by the FDIC;

(vi)

guaranteed reinvestment agreements issued by any bank, insurance company or other corporation acceptable to the Rating Agencies at the time of the issuance of such agreements, as evidenced by a signed writing delivered by each Rating Agency;

(vii)

repurchase obligations with respect to any security described in clauses (i) and (ii) above, in either case entered into with a depository institution or trust company (acting as principal) described in clause (iv) above;

(viii)

securities (other than stripped bonds, stripped coupons or instruments sold at a purchase price in excess of 115% of the face amount thereof) bearing interest or sold at a discount issued by any corporation incorporated under the laws of the United States or any state thereof which, at the time of such investment, have one of the two highest ratings of each Rating Agency (except if the Rating Agency is Moody’s, such rating shall be the highest commercial paper rating of Moody’s for any such series), or such lower rating as shall not result in the downgrading or withdrawal of the ratings then assigned to the Certificates by the Rating Agencies, as evidenced by a signed writing delivered by each Rating Agency;

(ix)

interests in any money market fund which at the date of acquisition of the interests in such fund and throughout the time such interests are held in such fund has the highest applicable rating by each Rating Agency rating such fund or such lower rating as shall not result in a change in the rating then assigned to the Certificates by each Rating Agency, as evidenced by a signed writing delivered by each Rating Agency, including funds for which the Trustee, the Master Servicer, the Securities Administrator or any of its Affiliates is investment manager or adviser;

(x)

short-term investment funds sponsored by any trust company or national banking association incorporated under the laws of the United States or any state thereof which on the date of acquisition has been rated by each applicable Rating Agency in their respective highest applicable rating category or such lower rating as shall not result in a change in the rating then specified stated maturity and bearing interest or sold at a discount acceptable to each Rating Agency as shall not result in the downgrading or withdrawal of the ratings then assigned to the Certificates by the Rating Agencies, as evidenced by a signed writing delivered by each Rating Agency; and

(xi)

such other investments having a specified stated maturity and bearing interest or sold at a discount acceptable to the Rating Agencies as shall not result in the downgrading or withdrawal of the ratings then assigned to the Certificates by the Rating Agencies, as evidenced by a signed writing delivered by each Rating Agency;

provided, that no such instrument shall be a Permitted Investment if (i) such instrument evidences the right to receive interest only payments with respect to the obligations underlying such instrument or (ii) such instrument would require the Depositor to register as an investment company under the Investment Company Act of 1940, as amended.

Person : Any individual, corporation, partnership, joint venture, association, joint-stock company, limited liability company, trust, unincorporated organization or government or any agency or political subdivision thereof.

PHH: PHH Mortgage Corporation formerly known as Cendant Mortgage Corporation, or any successor in interest.

PHH Mortgage Loan:  Each Mortgage Loan originated by PHH and listed on the Mortgage Loan Schedule.

PHH Purchase and Servicing Agreement :  Each agreement between the Seller and PHH listed under the heading "Purchase and Servicing Agreements" in Exhibit E hereto, as modified by the related Acknowledgement.

Pool Balance : As to any Distribution Date, the aggregate of the Stated Principal Balances of all the Mortgage Loans outstanding on the Due Date of the month preceding the month of that Distribution Date.

Prepayment Interest Shortfall : With respect to any full or partial Principal Prepayment of a Mortgage Loan, the excess, if any, of (i) one full month’s interest at the applicable Net Mortgage Rate on the Stated Principal Balance of such Mortgage Loan immediately prior to such Principal Prepayment over (ii) the amount of interest actually received with respect to such Mortgage Loan in connection with such Principal Prepayment.

Prepayment Period : With respect to each Distribution Date, the calendar month immediately preceding the month in which the Distribution Date occurs.

Prepayment Premium : With respect to each Mortgage Loan, the prepayment charge or penalty interest required to be paid by the Mortgagor in connection with a prepayment of the related Mortgage Loan, as provided in the related Mortgage Note or Mortgage.

Primary Mortgage Insurance Policy : Each policy of primary mortgage guaranty insurance or any replacement policy therefor with respect to any Mortgage Loan.

Principal Distribution Amount :  With respect to any Distribution Date, the sum of (i) the Basic Principal Distribution Amount for such Distribution Date and (ii) the Overcollateralization Increase Amount for such Distribution Date.

Principal Prepayment : Any Mortgagor payment of principal or other recovery of principal on a Mortgage Loan that is recognized as having been received or recovered in advance of its scheduled Due Date and applied to reduce the principal balance of the Mortgage Loan in accordance with the terms of the Mortgage Note or the related Purchase and Servicing Agreement or Servicing Agreement, as applicable.

Principal Prepayment In Full : Any Principal Prepayment of the entire principal balance of a Mortgage Loan.

Principal Remittance Amount :  With respect to any Distribution Date, the sum of (a) the principal portion of each Scheduled Payment collected or advanced on each Mortgage Loan and due during the related Due Period, (b) that portion of the Purchase Price representing principal of any Mortgage Loan purchased in accordance with Section 2.05 hereof and received during the related Prepayment Period, (c) the principal portion of any related Substitution Amount received during the related Prepayment Period, (d) the principal portion of all Insurance Proceeds received during the related Prepayment Period with respect to the Mortgage Loans that were not yet liquidated during the related Prepayment Period, (e) the principal portion of all Net Liquidation Proceeds received during the related Prepayment Period with respect to the Liquidated Mortgage Loans, (f) the principal portion of all partial and full principal prepayments made by the borrower on a Mortgage Loan during the related Prepayment Period, (g) any Subsequent Recoveries received during the related Prepayment Period in respect of Mortgage Loan and (h) on the Distribution Date on which the Trust Fund is to be terminated pursuant to Article VII hereof, that portion of the Redemption Price in respect of principal up to the portion of the Par Value in respect of principal.

Proprietary Lease : With respect to any Cooperative Property, a lease or occupancy agreement between a Cooperative Corporation and a holder of related Cooperative Shares.

Prospectus : The prospectus supplement dated November 28, 2006, together with the accompanying prospectus dated September 21, 2006, relating to the Certificates.

Purchase Agreement : The agreements listed under the heading "Purchase Agreements" in Exhibit E hereto, as each such agreement may be amended or supplemented from time to time as permitted hereunder.

Purchase and Servicing Agreement :  The agreements listed under the heading "Purchase and Servicing Agreements" in Exhibit E hereto, as each such agreement may be amended or supplemented from time to time as permitted hereunder.

Purchase Price :  With respect to any Mortgage Loan required or permitted to be purchased by the Seller or the Depositor pursuant to this Agreement, or by the related Originator or Servicer pursuant to the related Purchase and Servicing Agreement or Purchase Agreement, as applicable, an amount equal to the sum of (i) 100% of the unpaid principal balance of the Mortgage Loan on the date of such purchase and (ii) accrued interest thereon at the applicable Net Mortgage Rate from the date through which interest was last paid by the Mortgagor to the Due Date in the month in which the Purchase Price is to be distributed to Certificateholders, or such other amount as may be specified in the related Purchase and Servicing Agreement or Purchase Agreement, as applicable.

Rating Agency : Each of S&P and Moody’s.

Realized Loss : With respect to each Liquidated Mortgage Loan, an amount (not less than zero or more than the Stated Principal Balance of the Mortgage Loan) as of the date of such liquidation, equal to (i) the Stated Principal Balance of the Liquidated Mortgage Loan as of the date of such liquidation, plus (ii) interest at the Mortgage Rate from the Due Date as to which interest was last paid or advanced (and not reimbursed) to Certificateholders up to the Due Date in the month in which Liquidation Proceeds are required to be distributed on the Stated Principal Balance of such Liquidated Mortgage Loan from time to time, minus (iii) the Liquidation Proceeds, if any, received during the month in which such liquidation occurred, to the extent applied as recoveries of interest at the Mortgage Rate and to principal of the Liquidated Mortgage Loan. With respect to each Mortgage Loan which has become the subject of a Deficient Valuation, if the principal amount due under the related Mortgage Note has been reduced, the Deficient Valuation Reduction.  With respect to each Mortgage Loan which has become the subject of a Debt-Service Reduction, the present value of all monthly Debt Service Reductions on the Mortgage Loan, assuming that the mortgagor pays each Scheduled Payment on the applicable Due Date and that no Principal Prepayments are received on the Mortgage Loan, discounted at the applicable Mortgage Rate.

Recognition Agreement : An agreement among a Cooperative Corporation, a lender and a Mortgagor with respect to a Cooperative Mortgage Loan whereby such parties (i) acknowledge that such lender may make, or intends to make, such Cooperative Loan, and (ii) make certain agreements with respect to such Cooperative Mortgage Loan.

Record Date : As to any Distribution Date and for any Class of Certificates, other than the Class A-1-A and the LIBOR Certificates, the last Business Day of the month preceding the month of a Distribution Date.  As to any Distribution Date and the Class A-1-A and the LIBOR Certificates, the Business Day immediately preceding such distribution date.

Redemption Date : As defined in Section 7.01(c)

Redemption Price : With respect to a Redemption Date, an amount equal to the greater of (1) the sum of (i) 100% of the Stated Principal Balance of each Mortgage Loan (other than in respect of REO Property) plus accrued and unpaid interest thereon from the date to which such interest was paid or advanced at the sum of the applicable Mortgage Rate, to but not including the Due Date in the month of the final Distribution Date and (ii) with respect to any REO Property, the appraised value of any related REO Property as determined by the higher of two appraisals completed by two independent appraisers selected by the Depositor at the expense of the Depositor and (iii) any remaining unreimbursed Advances and Servicing Advances and unpaid Servicing Fees with respect to the related Mortgage Loans, and any other amounts payable to the Trustee, the Master Servicer and Securities Administrator, in each case relating to the related Mortgage Loans and (2) the Fair Market Value of all of the property in the Trust Fund.

Reference Bank Rate :  As to any Accrual Period relating to the LIBOR Certificates as follows: the arithmetic mean (rounded upwards, if necessary, to the nearest one sixteenth of a percent) of the offered rates for United States dollar deposits for one month which are offered by the Reference Banks as of 11:00 A.M., London time, on the LIBOR Determination Date prior to the first day of such Accrual Period to prime banks in the London interbank market for a period of one month in amounts approximately equal to the aggregate Class Principal Amount or Class Notional Amount, as applicable, of the LIBOR Certificates; provided that at least two such Reference Banks provide such rate.  If fewer than two offered rates appear, the Reference Bank Rate will be the arithmetic mean of the rates quoted by one or more major banks in New York City, selected by the Securities Administrator, as of 11:00 A.M., New York City time, on such date for loans in U.S. Dollars to leading European banks for a period of one month in amounts approximately equal to the aggregate Class Principal Amount or Class Notional Amount, as applicable, of the LIBOR Certificates.  If no such quotations can be obtained, the Reference Bank Rate shall be the Reference Bank Rate applicable to the preceding Accrual Period.

Reference Banks :  Three major banks that are engaged in the London interbank market, selected by the Securities Administrator.

Refinancing Mortgage Loan : Any Mortgage Loan originated in connection with the refinancing of an existing mortgage loan.

Regular Certificates : Each Class of Certificates other than the Class A-R Certificates.

Regulation AB : Subpart 229.1100 – Asset Backed Securities (Regulation AB), 17 C.F.R. §§229.1100 - 229.1123, as such may be amended from time to time, and subject to such clarification and interpretation as have been provided by the Commission in the adopting release (Asset-Backed Securities, Securities Act Release No. 33-8518, 70 Fed. Reg. 1,506, 1,531 (Jan. 7, 2005)) or by the staff of the Commission, or as may be provided by the Commission or its staff from time to time.  

Relevant Servicing Criteria : The Servicing Criteria applicable to the various parties, as set forth on Exhibit M attached hereto.  For clarification purposes, multiple parties can have responsibility for the same Relevant Servicing Criteria.  With respect to a Servicing Function Participant engaged by the Master Servicer, the Securities Administrator, the Trustee, a Servicer or a Custodian, the term "Relevant Servicing Criteria" may refer to a portion of the Relevant Servicing Criteria applicable to such parties.

Relief Act Shortfalls : With respect to any Distribution Date and any Mortgage Loan as to which there has been a reduction in the amount of interest collectible thereon for the most recently ended calendar month as a result of the application of the Civil Relief Act, the amount, if any, by which (i) interest collectible on such Mortgage Loan for the most recently ended calendar month is less than (ii) interest accrued thereon for such month pursuant to the Mortgage Note.

REMIC : Each pool of assets in the Trust Fund designated as a REMIC as described in the Preliminary Statement.

REMIC Provisions : The provisions of the federal income tax law relating to real estate mortgage investment conduits, which appear at sections 860A through 860G of the Code, and related provisions, and regulations, including proposed regulations and rulings, and administrative pronouncements promulgated thereunder, as the foregoing may be in effect from time to time.

REMIC Swap Rate :  For each Swap Payment Date (and the related Accrual Period), a per annum rate equal to the product of: (i) the percentage used to calculate the Fixed Swap Payment for such date and (ii) 2.

REO Property : A Mortgaged Property acquired by the Trust Fund through foreclosure or deed-in-lieu of foreclosure in connection with a defaulted Mortgage Loan or otherwise treated as having been acquired pursuant to the REMIC Provisions.

Replacement Mortgage Loan : A mortgage loan substituted by an Originator or the Seller for a Deleted Mortgage Loan which must, on the date of such substitution, as confirmed in a request for release, substantially in the form attached to the related Custodial Agreement, (i) have a Stated Principal Balance, after deduction of the principal portion of the Scheduled Payment due in the month of substitution, not in excess of, and not more than 10% less than the Stated Principal Balance of the Deleted Mortgage Loan; (ii) have a Mortgage Rate not less than and not more than one percentage point greater than the Deleted Mortgage Loan; (iii) have a Loan-to-Value Ratio no higher than that of the Deleted Mortgage Loan; (iv) have a remaining term to maturity no greater than (and not more than one year less than that of) the Deleted Mortgage Loan; (v) comply with each representation and warranty set forth in the related Purchase and Servicing Agreement or Purchase Agreement, as applicable; and (xii) shall be accompanied by an Opinion of Counsel that such Replacement Mortgage Loan would not adversely affect the REMIC status of any REMIC created hereunder or would not otherwise be prohibited by this Pooling and Servicing Agreement.

Reportable Event : Has the meaning set forth in Section 11.03.

Residual Certificate : The Class A-R Certificates and the Uncertificated Interests.

Responsible Officer : With respect to the Trustee, any officer in the corporate trust department or similar group of the Trustee with direct responsibility for the administration of this Agreement and also, with respect to a particular corporate trust matter, any other officer to whom such matter is referred because of his or her knowledge of and familiarity with the particular subject.

Restricted Certificate : The A-R, Class CE and Class P Certificates and any Uncertificated Interest.

S&P : Standard & Poor’s Ratings Services, a division of the McGraw-Hill Companies, Inc.

SAIF : The Saving’s Association Insurance Fund, or any successor thereto.

Sarbanes-Oxley Act : The Sarbanes-Oxley Act of 2002 and the rules and regulations of the Commission promulgated thereunder (including any interpretations thereof by the Commission’s staff).

Sarbanes-Oxley Certification : A written certification signed by an officer of the Master Servicer that complies with (i) the Sarbanes-Oxley Act of 2002, as amended from time to time, and (ii) Exchange Act Rules 13a-14(d) and 15d-14(d), as in effect from time to time; provided that if, after the Closing Date (a) the Sarbanes-Oxley Act of 2002 is amended, (b) the Rules referred to in clause (ii) are modified or superceded by any subsequent statement, rule or regulation of the Commission or any statement of a division thereof, or (c) any future releases, rules and regulations are published by the Commission from time to time pursuant to the Sarbanes-Oxley Act of 2002, which in any such case affects the form or substance of the required certification and results in the required certification being, in the reasonable judgment of the Master Servicer, materially more onerous that then form of the required certification as of the Closing Date, the Sarbanes-Oxley Certification shall be as agreed to by the Master Servicer, the Depositor and the Seller following a negotiation in good faith to determine how to comply with any such new requirements.

Scheduled Payment :  The scheduled monthly payment on a Mortgage Loan due on any Due Date allocable to principal and/or interest on such Mortgage Loan which, unless otherwise specified in the related Purchase and Servicing Agreement, Purchase Agreement or Servicing Agreement, as applicable, shall give effect to any related Debt Service Reduction and any Deficient Valuation that affects the amount of the monthly payment due on such Mortgage Loan.

Securities Act : The Securities Act of 1933, as amended, and the rules and regulations thereunder.

Securities Administrator : Wells Fargo Bank, N.A., not in its individual capacity but solely as Securities Administrator, or any successor in interest, or if any successor securities administrator shall be appointed as herein provided, then such successor securities administrator.

Seller : J.P. Morgan Mortgage Acquisition Corp., a Delaware corporation.

Senior Certificates :  The Class A-1-A, Class A-1-B, Class A-2-A, Class A-2-B, Class A-3-A, Class A-3-B, Class A-4, Class A-5, Class A-6 and Class A-7 Certificates.

Senior Enhancement Percentage :  For any Distribution Date, the percentage obtained by dividing (x) the sum of (i) the aggregate Class Principal Amount of the Mezzanine and Subordinate Certificates (after giving effect to the distribution of the Principal Distribution Amount on such Distribution Date) and (ii) the Overcollateralized Amount (after giving effect to the distribution of the Principal Distribution Amount on such Distribution Date) by (y) the Aggregate Collateral Balance as of the last day of the related Due Period.

Senior Principal Distribution Amount :  For any applicable Distribution Date, an amount equal to the excess of (x) the aggregate Class Principal Amount of the Senior Certificates immediately prior to such Distribution Date over (y) the lesser of (A) the product of (1) 89.00% and (2) the Aggregate Collateral Balance as of the last day of the related Due Period and (B) the Aggregate Collateral Balance as of the last day of the related Due Period minus the Overcollateralization Floor.

Servicer : Each of Countrywide, Fifth Third, GreenPoint, Indymac, JPMCB, National City, PHH, SunTrust and WAMU.

Servicer Advance : A "Servicing Advance" as defined in the applicable Purchase and Servicing Agreement.

Service(s)(ing) : In accordance with Regulation AB, the act of servicing and administering the Mortgage Loans or any other assets of the Trust by an entity that meets the definition of "servicer’ set forth in Item 1101 of Regulation AB and is subject to the disclosure requirements set forth in Item 1108 of Regulation AB.  For clarification purposes, any uncapitalized occurrence of this term shall have the meaning commonly understood by participants in the residential mortgage-backed securitization market.

Servicing Agreement :  The agreements listed under the heading "Servicing Agreements" in Exhibit E hereto, as each such agreement may be amended or supplemented from time to time as permitted hereunder.

Servicing Criteria :  The criteria set forth in paragraph (d) of Item 1122 of Regulation AB, as such may be amended from time to time.

Servicing Fee : As to any Distribution Date and each Mortgage Loan, an amount equal to the product of (a) one-twelfth of the Servicing Fee Rate and (b) the Stated Principal Balance of such Mortgage Loan as of the first day of the related Due Period.

Servicing Fee Rate :  With respect to each Mortgage Loan and any Distribution Date, the rate specified in the related Purchase and Servicing Agreement or Servicing Agreement, as applicable.

Servicing Function Participant : Any Sub-Servicer, Subcontractor or any other Person, other than each Servicer, the Master Servicer, the Trustee, the Securities Administrator and the Custodians, that is performing material activities addressed by the Servicing Criteria.

Servicing Officer :  Any officer of the related Servicer involved in, or responsible for, the administration and servicing of the related Mortgage Loans whose name and facsimile signature appear on a list of servicing officers furnished to the Master Servicer by the related Servicer on the Closing Date pursuant to the related Purchase and Servicing Agreement or Servicing Agreement, as applicable, as such list may from time to time be amended.

Significance Percentage :  With respect to any Distribution Date, and in accordance with Item 1115 of Regulation AB, shall be a percentage equal to (a) an amount determined based on the reasonable good faith estimate by the Depositor of the aggregate maximum probable exposure of the outstanding Certificates to the Swap Agreement, divided by (b) the aggregate outstanding Class Principal Amount of the Certificates, prior to the distribution of the Principal Remittance Amount on such Distribution Date.

Startup Day : The day designated as such pursuant to Section 10.01(b) hereof.

Stated Principal Balance : As to any Mortgage Loan and Due Date, the unpaid principal balance of such Mortgage Loan as of such Due Date as specified in the amortization schedule at the time relating thereto (before any adjustment to such amortization schedule by reason of any moratorium or similar waiver or grace period) after giving effect to any previous partial Principal Prepayments and Liquidation Proceeds allocable to principal (other than with respect to any Liquidated Mortgage Loan) and to the payment of principal due on such Due Date and irrespective of any delinquency in payment by the related Mortgagor.

Step-Down Date :  The earlier to occur of (1) the Distribution Date on which the aggregate Class Principal Amount of the Senior Certificates has been reduced to zero and (2) the later to occur of (x) the Distribution Date occurring in December 2009 and (y) the first Distribution Date on which the Senior Enhancement Percentage is greater than or equal to 11.00% (for the purpose of this definition only, the Senior Enhancement Percentage shall be calculated prior to the distribution of Principal Distribution Amount on the Mezzanine and Subordinate Certificates).

Sub-Servicer : Any Person that (i) is a Servicing Function Participant, (ii) services Mortgage Loans on behalf of any Servicer, and (iii) is responsible for the performance (whether directly or through sub-servicers or Subcontractors) of Servicing functions required to be performed under this Agreement, any related Purchase and Servicing Agreement or Servicing Agreement, as applicable, or any sub-servicing agreement that are identified in Item 1122(d) of Regulation AB.

Subcontractor : Any vendor, subcontractor or other Person that (i) is a Servicing Function Participant and (ii) is not responsible for the overall servicing of Mortgage Loans but performs one or more discrete functions identified in Item 1122(d) of Regulation AB with respect to Mortgage Loans under the direction or authority of any Servicer (or a Sub-Servicer of any Servicer), the Master Servicer, the Trustee, a Custodian or the Securities Administrator.

Subordinate Certificates :  The Class B-1 Certificates.

Subordinate Class Principal Distribution Amount : With respect to the Subordinate Certificates and Distribution Date, an amount equal to the excess of (x) the sum of (1) the Class Principal Amount of the Subordinate Certificates immediately prior to such Distribution Date, (2) the aggregate Class Principal Amount of the Senior Certificates (after taking into account the payment of the Senior Principal Distribution Amount on such Distribution Date), (3) the aggregate Class Principal Amount of the Mezzanine Certificates (after taking into account the payment of the Mezzanine Class Principal Distribution Amounts on such Distribution Date) over (y) the lesser of (A) the product of (1) 100%, minus the related Targeted Credit Enhancement Percentage and (2) the Aggregate Collateral Balance as of the last day of the related Due Period and (B) the Aggregate Collateral Balance as of the last day of the related Due Period minus the Overcollateralization Floor.

Subsequent Recoveries : With respect to any Distribution Date, with respect to a Liquidated Mortgage Loan that resulted in a Realized Loss in a prior calendar month, amounts received by the Securities Administrator from the Master Servicer or Servicer, specifically related to such Liquidated Mortgage Loan.

Substitution Amount : As defined in the second paragraph of Section 2.05(b).

SunTrust : SunTrust Mortgage, Inc.

SunTrust Mortgage Loan : Each Mortgage Loan originated by SunTrust and listed on the Mortgage Loan Schedule.

SunTrust Purchase and Servicing Agreement : Each agreement between the Seller and SunTrust listed under the heading "Purchase and Servicing Agreements" in Exhibit E hereto, as modified by the related Acknowledgement.

Swap Account : The separate Eligible Account created and maintained by the Securities Administrator, on behalf of the Trustee, pursuant to Section 5.06.  Funds in the Swap Account shall be held in trust for the Trustee and the Certificateholders for the uses and purposes set forth in this Agreement.  

Swap Agreement : The 1992 ISDA Master Agreement (Multicurrency-Cross Border) dated as of November 29, 2006 (together with the schedule thereto, the Master Agreement) between the Swap Provider and the Securities Administrator on behalf of the Swap Trust, an ISDA Credit Support Annex (Bilateral Form-New York Law) as of the same date, which supplements, forms part of, and is subject to the Master Agreement, and a confirmation of the same date, which supplements and forms part of the Master Agreement.

Swap Agreement Notional Amount : With respect to the Swap Agreement and any Distribution Date, the amount set forth in the table in Exhibit D in the column entitled "Swap Agreement Notional Amount" for such Distribution Date.

Swap Business Days :  Any day other than a Saturday, a Sunday or a day on which banking or savings and loan institutions in the City of New York are authorized or obligated by law or executive order to be closed.

Swap Default : An Event of Default under the Swap Agreement, including, among others, the following standard events of default under the ISDA Master Agreement:

·

Failure to Pay or Deliver,

·

Bankruptcy (as defined in the Swap Agreement) and

·

Merger without Assumption (but only with respect to the Swap Provider), as described in Sections 5(a)(vii), 5(a)(viii) and 5(b)(iv) of the ISDA Master Agreement.

Swap Early Termination : The occurrence of an Early Termination Date under the Swap Agreement.

Swap LIBOR : A per annum rate equal to the floating rate payable by the Swap Provider under the Swap Agreement determined by taking into account the day count convention used to determine the amount of the payment required by the Swap Provider and expressing such rate as so determined on an actual/360 basis.

Swap Payment Date : Two Swap Business Days prior to the Distribution Date.

Swap Provider : JPMorgan Chase Bank, National Association.

Swap Provider Trigger Event : A Swap Termination Payment that is triggered upon: (i) an Event of Default under the Swap Agreement with respect to which the Swap Provider is a Defaulting Party (as defined in the Swap Agreement), (ii) a Termination Event under the Swap Agreement with respect to which the Swap Provider is the sole Affected Party (as defined in the Swap Agreement) or (iii) an Additional Termination Event under the Swap Agreement with respect to which the Swap Provider is the sole Affected Party.

Swap Termination Payment : The amount, if any, owed by the Swap Trust or the Swap Provider upon a Swap Early Termination.

Swap Trust : The trust established pursuant to Section 5.06(a).

Swap Trustee : The trustee of the Swap Trust, as established pursuant to Section 5.06(a).

Targeted Credit Enhancement Percentage : With respect to any Class of Mezzanine and Subordinate Certificates, the percentage set forth opposite such class in the table below:

Tax Matters Person : With respect to each REMIC created hereby, the "tax matters person" as specified in the REMIC Provisions, which shall initially be the Holders of the related Residual Certificate.

Termination Event : Under the Swap Agreement, the following standard events under the ISDA Master Agreement:

·

Illegality (which generally relates to changes in law causing it to become unlawful for either party to perform its obligations under the Swap Agreement),

·

Tax Event (which generally relates to either party to the Swap Agreement receiving a payment under the Swap Agreement from which an amount has been deducted or withheld for or on account of taxes) and

·

Tax Event Upon Merger (solely with respect to the Swap Provider as merging party) (which generally relates to the Swap Provider’s receiving a payment under the Swap Agreement from which an amount has been deducted or withheld for or on account of taxes resulting from a merger),

as described in Sections 5(b)(i), 5(b)(ii) and 5(b)(iii) of the ISDA Master Agreement.

Trigger Event :  Is in effect with respect to any Distribution Date on or after the Step-Down Date if either (i) the percentage obtained by dividing (x) the Aggregate Stated Principal Balance of the Mortgage Loans that are 60 days or more Delinquent or REO or in bankruptcy or in foreclosure as of the last day of the prior calendar month by (y) the Aggregate Collateral Balance as of the last day of the previous calendar month exceeds 50.00% of the Senior Enhancement Percentage for such Distribution Date or (ii) the cumulative Realized Losses on the Mortgage Loans (after reduction for all Subsequent Recoveries received from the Cut-off Date through the last day of the related Due Period) as a percentage of the Aggregate Collateral Balance as of the Cut-off Date is greater than the percentage set forth in the following table:

_____________________

*

The percentages indicated are the percentages applicable for the first Distribution Date in the corresponding range of Distribution Dates.  The percentage for each succeeding Distribution Date in a range increases incrementally by 1/12th of the positive difference between the percentage applicable to the first Distribution Date in that range and the percentage applicable to the first Distribution Date in the succeeding range.

Trust Fund : The corpus of the trust created pursuant to this Agreement, consisting of the Mortgage Loans and all interest and principal received thereon on or after the related Cut-off Date (other than Scheduled Payments due on or prior to the related Cut-off Date), the Depositor’s rights assigned to the Trustee under the Purchase and Servicing Agreements, the Purchase Agreements and the Servicing Agreements, as modified by the Acknowledgements, the Trust’s rights under the Insurance Policies relating to the Mortgage Loans, the trust’s rights to receive payments under the Swap Agreement, all cash, instruments or property held or required to be held in the Custodial Accounts, the Distribution Account, property that secured a Mortgage Loan, the pledge, control and guaranty agreements.

Trustee : U.S. Bank National Association, a national banking association, organized under the laws of the United States and any Person succeeding the Trustee hereunder, or if any successor trustee or any co-trustee shall be appointed as herein provided, then such successor trustee and such co-trustee, as the case may be.

Trustee Mortgage Files : as defined in Section 2.01(a).

UCC : The Uniform Commercial Code as enacted in the relevant jurisdiction.

Uncertificated Interest : The 1-LT-R Interest.

Underwriter : J.P. Morgan Securities Inc.

Underwriter’s Exemption : The prohibited transaction exemption granted to the Underwriter, or its affiliate, and most recently amended and restated by PTE 2002 19, or any substantially similar administrative exemption granted by the U.S. Department of Labor to the Underwriter.

Underwriting Agreement : The Underwriting Agreement, dated February 24, 2006, among the Seller, the Depositor and the Underwriter.

Uniform Commercial Code : The Uniform Commercial Code as in effect in any applicable jurisdiction from time to time.

Unpaid Realized Loss Amount :  For any Class of Senior, Mezzanine or Subordinate Certificates and Distribution Date, the Allocated Realized Loss Amount for such Distribution Date, less any additions to the Class Principal Amount pursuant to Section 5.03(f) on such Distribution Date.

Upper-Tier REMIC : As described in the Preliminary Statement.

Voting Interests : The portion of the voting rights of all the Certificates that is allocated to any Certificate for purposes of the voting provisions of this Agreement.  At all times during the term of this Agreement, 1.00% of all Voting Interests shall be allocated to the Class A-R Certificates and all other Classes of Certificates will be allocated 99.00% of all Voting Interests.  Voting Interests shall be allocated among such other Classes of Certificates (other than the Class P Certificate) based on the product of (i) 99.00% and (ii) the fraction, expressed as a percentage, the numerator of which is the aggregate Class Principal Amounts for each Class then outstanding and the denominator of which is the Class Principal Amounts of all Certificates outstanding.  Voting Interests shall be allocated among the Certificates within each such Class in proportion to their Certificate Principal Amounts or Percentage Interests.

WAMU: Washington Mutual Bank, or any successor in interest.

WAMU Servicing Agreement :  Each agreement between the Seller and WAMU listed under the heading "Purchase and Servicing Agreements" in Exhibit E hereto, as modified by the related Acknowledgement.

WMMSC: Washington Mutual Mortgage Securities Corp., or any successor in interest.

WMMSC Mortgage Loan:  Each Mortgage Loan originated by WMMSC and listed on the Mortgage Loan Schedule.

WMMSC Purchase Agreement :  Each agreement between the Seller and WMMSC listed under the heading "Purchase and Servicing Agreements" in Exhibit E hereto, as modified by the related Acknowledgement.

SECTION 1.02

Calculations Respecting Mortgage Loans.  

Calculations required to be made pursuant to this Agreement with respect to any Mortgage Loan in the Trust Fund shall be made based upon current information as to the terms of the Mortgage Loans and reports of payments received from the Mortgagor on such Mortgage Loans and payments to be made to the Securities Administrator as supplied to the Securities Administrator by the Master Servicer or the related Servicer.  The Securities Administrator shall not be required to recompute, verify or recalculate the information supplied to it by the Master Servicer or a Servicer.

ARTICLE II

DECLARATION OF TRUST;
ISSUANCE OF CERTIFICATES

SECTION 2.01

Creation and Declaration of Trust Fund; Conveyance of Mortgage Loans.  

(a)

Concurrently with the execution and delivery of this Agreement, the Depositor does hereby transfer, assign, set over, deposit with and otherwise convey to the Trustee, without recourse, subject to Sections 2.02 and 2.05, in trust, all the right, title and interest of the Depositor in and to the Trust Fund.  Such conveyance includes, without limitation: (i) the Mortgage Loans, including the right to all payments of principal and interest received on or with respect to the Mortgage Loans on and after the Cut-off Date (other than Scheduled Payments due on or before such date), and all such payments due after such date but received prior to such date and intended by the related Mortgagors to be applied after such date; (ii) all of the Depositor’s right, title and interest in and to all amounts from time to time credited to and the proceeds of the Distribution Account, any Custodial Accounts or any Escrow Account established with respect to the Mortgage Loans; (iii) all of the rights of the Depositor as assignee of the Seller with respect to the Seller’s rights under the Purchase and Servicing Agreement, the Servicing Agreements and the Purchase Agreements pursuant to the Acknowledgements; (iv) all of the Depositor’s right, title or interest in REO Property and the proceeds thereof; (v) all of the Depositor’s rights under any Insurance Policies related to the Mortgage Loans and (vi) if applicable, the Depositor’s security interest in any collateral pledged to secure the Mortgage Loans, including the Mortgaged Properties, including, but not limited to, the pledge, control and guaranty agreements and the Limited Purpose Surety Bond to have and to hold, in trust; and the Trustee declares that, subject to the review provided for in Section 2.02, it has received and shall hold the Trust Fund, as trustee, in trust, for the benefit and use of the Holders of the Certificates and the Swap Provider and for the purposes and subject to the terms and conditions set forth in this Agreement, and, concurrently with such receipt, has caused to be executed, authenticated and delivered to or upon the order of the Depositor, in exchange for the Trust Fund, Certificates in the authorized denominations evidencing the entire ownership of the Trust Fund.

The foregoing sale, transfer, assignment, set-over, deposit and conveyance does not and is not intended to result in the creation or assumption by the Trustee of any obligation of the Depositor, the Seller or any other Person in connection with the Mortgage Loans or any other agreement or instrument relating thereto except as specifically set forth therein.

In connection with such transfer and assignment of the Mortgage Loans, the applicable Custodian acting on the Trustee’s behalf, will continue to hold the documents or instruments listed below with respect to each Mortgage Loan (each, a "Trustee Mortgage File") so transferred and assigned.

The Trustee shall be under no duty or obligation to inspect, review or examine said documents, instruments, certificates or other papers to determine that the same are genuine, enforceable or appropriate for the represented purpose or that they have actually been recorded in the real estate records or that they are other than what they purport to be on their face.

On the Closing Date, each Custodian shall deliver to the Trustee, the Securities Administrator and the Depositor, a certification ("Custodian Certification") substantially in the form attached hereto as Exhibit L certifying that, pursuant to each related Custodial Agreement, the applicable Originator delivered and released to such Custodian, subject to and in accordance with the relevant section of each related Purchase and Servicing Agreement, Purchase Agreement or Custodial Agreement, the following documents pertaining to each of the Mortgage Loans identified in the Mortgage Loan Schedule (provided, however, that a Custodian shall not be required nor does it intend to re-examine the contents of the Trustee Mortgage File for any of the Mortgage Loans in connection with entering into this Agreement or providing the Custodian Certification required pursuant to this Section 2.01):

(i)

with respect to each Mortgage Loan, the original Mortgage Note endorsed without recourse in proper form to the order of the Trustee, or in blank (in each case, with all necessary intervening endorsements, as applicable);

(ii)

with respect to each Mortgage Loan (other than a Cooperative Loan) that is not a MERS Mortgage Loan, the original Mortgage with evidence of recording thereon or a recorded copy and in the case of the each MERS Mortgage Loan, the original Mortgage, noting the presence of the MIN of the Mortgage Loans and either language indicating that the Mortgage Loan is a MOM Loan if the Mortgage Loan is a MOM Loan or if the Mortgage Loan was not a MOM Loan at origination, the original Mortgage and the assignment thereof to MERS, with evidence of recording indicated thereon; or if the original Mortgage assignment has not yet been returned from the recording office, a copy of such Mortgage certified by the applicable Originator to be a true copy of the original of the Mortgage which has been sent for recording in the appropriate jurisdiction in which the Mortgaged Property is located;

(iii)

with respect to each Mortgage Loan (other than a Cooperative Loan) that is not a MERS Mortgage Loan, the Assignment of Mortgage in form and substance acceptable for recording in the relevant jurisdiction, such assignment being either (A) in blank, without recourse, or (B) endorsed to "U.S. Bank National Association, as Trustee of J.P. Morgan Alternative Loan Trust 2006-S4, Mortgage Pass-Through Certificates, without recourse";

(iv)

with respect to each Mortgage Loan (other than a Cooperative Loan) that is not a MERS Mortgage Loan, the originals of all intervening assignments of the Mortgage, if any, with evidence of recording thereon or a recorded copy, or if the original intervening assignment has not yet been returned from the recording office, a copy of such assignment certified by the applicable Originator to be a true copy of the original of the assignment which has been sent for recording in the appropriate jurisdiction in which the Mortgaged Property is located;

(v)

with respect to each Mortgage Loan (other than a Cooperative Loan), the originals of all assumption, modification, consolidation or extension agreements, if any, with evidence of recording thereon; or if the original assumption, modification, consolidation or extension agreements has not yet been returned from the recording office, a copy of such documents certified by the applicable Originator to be a true copy of the original of the Mortgage which has been sent for recording in the appropriate jurisdiction in which the Mortgaged Property is located;

(vi)

if applicable, with respect to each Mortgage Loan (other than a Cooperative Loan), the original policy of title insurance (or a true copy thereof) with respect to any such Mortgage Loan, or, if such policy has not yet been delivered by the insurer, the title commitment or title binder to issue same;

(vii)

if applicable, with respect to each Mortgage Loan (other than a Cooperative Loan), a copy of the power of attorney and guaranty agreement with respect to such Mortgage Loan;

(viii)

if applicable, the original or certified copy of the certificates evidencing ownership of the Cooperative Shares issued by the Cooperative Corporation and related assignment of such certificates or an assignment of such Cooperative Shares, in blank, executed by the Mortgagor with such signature guaranteed;

(ix)

with respect to each Mortgage Loan which constitutes a Cooperative Loan:

(1)

the original of any security agreement or similar document executed in connection with the Cooperative Loan;

(2)

the original Recognition Agreement;

(3)

UCC-1 financing statements with recording information thereon from the appropriate governmental recording offices if necessary to perfect the security interest of the Cooperative Loan under the Uniform Commercial Code in the jurisdiction in which the Cooperative Property is located, accompanied by UCC-3 financing statements executed in blank for recordation of the change in the secured party thereunder;

(4)

the original Proprietary Lease and the Assignment of Proprietary Lease and original stock certificate executed by the Mortgagor in blank or if the Proprietary Lease has been assigned by the Mortgagor to the Seller, then the Seller must execute an assignment of the Assignment of Proprietary Lease in blank; and

(5)

any other document or instruments required to be delivered under the related Custodial Agreement.

In addition, in connection with the assignment of any MERS Mortgage Loan, it is understood that the related Originator will cause the MERS® System to indicate that such Mortgage Loans have been assigned by the related Originator to the Trustee in accordance with this Agreement for the benefit of the Certificateholders by including (or deleting, in the case of Mortgage Loans which are repurchased in accordance with this Agreement) in such computer files the information required by the MERS® System to identify the series of Certificates issued in connection with such Mortgage Loans.  It is further understood that the related Originator will not, and the Servicer hereby agrees that it will not, alter the information referenced in this paragraph with respect to any Mortgage Loan during the term of this Agreement unless and until such Mortgage Loan is repurchased in accordance with the terms of this Agreement.

(b)

[Reserved].

(c)

In instances where a title insurance policy is required to be delivered to the Trustee or a Custodian on behalf of the Trustee and is not so delivered, the Depositor will provide a copy of such title insurance policy to the Trustee, or to the applicable Custodian on behalf of the Trustee, as promptly as practicable after the execution and delivery hereof, but in any case within 180 days of the Closing Date.

(d)

For Mortgage Loans (if any) that have been prepaid in full after the Cut-off Date and prior to the Closing Date, the Depositor, in lieu of delivering the above documents, herewith delivers to the Trustee, or to the applicable Custodian on behalf of the Trustee, an Officer’s Certificate which shall include a statement to the effect that all amounts received in connection with such prepayment that are required to be deposited in the Distribution Account pursuant to Section 4.01 have been so deposited.  All original documents that are not delivered to the Trustee or the applicable Custodian on behalf of the Trustee shall be held by the related Servicer in trust for the benefit of the Trustee and the Certificateholders.

(e)

The Depositor and the Trustee hereto agree and understand that it is not intended that any Mortgage Loan be included in the Trust Fund that is (i) a "High-Cost Home Loan" as defined in the New Jersey Home Ownership Act effective November 27, 2003, (ii) a "High-Cost Home Loan" as defined in the New Mexico Home Loan Protection Act effective January 1, 2004, (iii) a "High Cost Home Mortgage Loan" as defined in the Massachusetts Predatory Home Loan Practices Act effective November 7, 2004, (iv) a  "high risk home loan" under the Illinois High Risk Home Loan Act, effective as of January 1, 2004, or (v) a "high-cost home loan" under the Indiana High Cost Home Loan Law, effective January 1, 2005.   The Trustee shall be entitled to indemnification from the Depositor and the Trust Fund for any loss, liability or expense arising out of, or in connection with, the provisions of this Section 2.01(e), including, without limitation, all costs, liabilities and expenses (including reasonable legal fees and expenses) of investigating and defending itself against any claim, action or proceeding, pending or threatened, relating to such provisions.

SECTION 2.02

Acceptance of Trust Fund by Trustee; Review of Documentation for Trust Fund.  

(a)

The Trustee, by execution and delivery hereof, acknowledges receipt by it or by a Custodian on its behalf of the Trustee Mortgage Files pertaining to the Mortgage Loans listed on the Mortgage Loan Schedule.  

(b)

With respect to the Mortgage Loans, in the event there exist exceptions noted on the related Custodian Certification (substantially in the form of Exhibit L), not later than 270 days after the Closing Date, the related Custodian shall deliver to the Trustee and the Depositor a further certification with any applicable exceptions noted thereon.

(c)

Nothing in this Agreement shall be construed to constitute an assumption by the Trust Fund, the Securities Administrator, the Trustee, any Custodian or the Certificateholders of any unsatisfied duty, claim or other liability on any Mortgage Loan or to any Mortgagor.

(d)

Each of the parties hereto acknowledges that (i) each Custodian has performed the applicable review of the Mortgage Loans and has delivered the Custodian Certification as provided herein and in the Custodial Agreements on the Closing Date and (ii) thereafter, if applicable, each Custodian shall perform the applicable review of the Mortgage Loans and deliver the further certifications as provided herein and in the applicable Custodial Agreements.

(e)

Upon execution of this Agreement, the Depositor hereby delivers to the Trustee and the Trustee acknowledges receipt of the Acknowledgements, together with the related Purchase and Servicing Agreements and Servicing Agreements.

SECTION 2.03

Representations and Warranties of the Depositor.  

(a)

The Depositor hereby represents and warrants to the Trustee, for the benefit of the Certificateholders, and to the Servicer, the Master Servicer, the Securities Administrator and the Swap Provider as of the Closing Date or such other date as is specified, that:

(i)

the Depositor is a corporation duly organized, validly existing and in good standing under the laws governing its creation and existence and has full corporate power and authority to own its property, to carry on its business as presently conducted, to enter into and perform its obligations under this Agreement, and to create the trust pursuant hereto;

(ii)

the execution and delivery by the Depositor of this Agreement have been duly authorized by all necessary corporate action on the part of the Depositor; neither the execution and delivery of this Agreement, nor the consummation of the transactions herein contemplated, nor compliance with the provisions hereof, will conflict with or result in a breach of, or constitute a default under, any of the provisions of any law, governmental rule, regulation, judgment, decree or order binding on the Depositor or its properties or the certificate of incorporation or bylaws of the Depositor;

(iii)

the execution, delivery and performance by the Depositor of this Agreement and the consummation of the transactions contemplated hereby do not require the consent or approval of, the giving of notice to, the registration with, or the taking of any other action in respect of, any state, federal or other governmental authority or agency, except such as has been obtained, given, effected or taken prior to the date hereof;

(iv)

this Agreement has been duly executed and delivered by the Depositor and, assuming due authorization, execution and delivery by the Trustee, the Master Servicer and the Securities Administrator, constitutes a valid and binding obligation of the Depositor enforceable against it in accordance with its terms except as such enforceability may be subject to (A) applicable bankruptcy and insolvency laws and other similar laws affecting the enforcement of the rights of creditors generally and (B) general principles of equity regardless of whether such enforcement is considered in a proceeding in equity or at law;

(v)

there are no actions, suits or proceedings pending or, to the knowledge of the Depositor, threatened or likely to be asserted against or affecting the Depositor, before or by any court, administrative agency, arbitrator or governmental body (A) with respect to any of the transactions contemplated by this Agreement or (B) with respect to any other matter which in the judgment of the Depositor will be determined adversely to the Depositor and will if determined adversely to the Depositor materially and adversely affect it or its business, assets, operations or condition, financial or otherwise, or adversely affect its ability to perform its obligations under this Agreement;

(vi)

immediately prior to the transfer and assignment of the Mortgage Loans to the Trustee, the Depositor was the sole owner of record and holder of each Mortgage Loan, and the Depositor had good and marketable title thereto, and had full right to transfer and sell each Mortgage Loan to the Trustee free and clear, subject only to (1) liens of current real property taxes and assessments not yet due and payable and, if the related Mortgaged Property is a condominium unit, any lien for common charges permitted by statute, (2) covenants, conditions and restrictions, rights of way, easements and other matters of public record as of the date of recording of such Mortgage acceptable to mortgage lending institutions in the area in which the related Mortgaged Property is located and specifically referred to in the lender’s title insurance policy or attorney’s opinion of title and abstract of title delivered to the originator of such Mortgage Loan, and (3) such other matters to which like properties are commonly subject which do not, individually or in the aggregate, materially interfere with the benefits of the security intended to be provided by the Mortgage, of any encumbrance, equity, participation interest, lien, pledge, charge, claim or security interest, and had full right and authority, subject to no interest or participation of, or agreement with, any other party, to sell and assign each Mortgage Loan pursuant to this Agreement;

(vii)

This Agreement creates a valid and continuing security interest (as defined in the applicable Uniform Commercial Code (the "UCC"), in the Mortgage Loans in favor of the Trustee, which security interest is prior to all other liens, and is enforceable as such against creditors of and purchasers from the Depositor;

(viii)

The Mortgage Loans constitute "instruments" within the meaning of the applicable UCC;

(ix)

Other than the security interest granted to the Trustee pursuant to this Agreement, the Depositor has not pledged, assigned, sold, granted a security interest in, or otherwise conveyed any of the Mortgage Loans.  The Depositor has not authorized the filing of and is not aware of any financing statement against the Depositor that includes a description of the collateral covering the Mortgage Loans other than a financing statement relating to the security interest granted to the Trustee hereunder or that has been terminated.  The Depositor is not aware of any judgment or tax lien filings against the Depositor;

(x)

None of the Mortgage Loans have any marks or notations indicating that such Mortgage Loans have been pledged, assigned or otherwise conveyed to any Person other than the Trustee; and

(xi)

The Depositor has received all consents and approvals required by the terms of the Mortgage Loans to convey the Mortgage Loans hereunder to the Trustee.

The foregoing representations made in this Section 2.03 shall survive the termination of this Agreement and shall not be waived by any party hereto

SECTION 2.04

Representations and Warranties as to the Mortgage Loans.

(a)

Representations and Warranties of the Depositor as to the Mortgage Loans .

The Depositor hereby represents and warrants to the Trustee with respect to the Mortgage Loans or each Mortgage Loan, as the case may be, as of the date hereof or such other date set forth herein that as of the Closing Date:

(i)

Immediately prior to the transfer and assignment contemplated herein, the Depositor was the sole owner and holder of the Mortgage Loans.  The Mortgage Loans were not assigned or pledged by the Depositor and the Depositor had good and marketable title thereto, and the Depositor had full right to transfer and sell the Mortgage Loans to the Trustee free and clear of any encumbrance, participation interest, lien, equity, pledge, claim or security interest and had full right and authority subject to no interest or participation in, or agreement with any other party to sell or otherwise transfer the Mortgage Loans.

(ii)

As of the Closing Date, the Depositor has transferred all right, title and interest in the Mortgage Loans to the Trustee on behalf of the Trust.

(iii)

As of the Closing Date, the Depositor has not transferred the Mortgage Loans to the Trustee on behalf of the Trust with any intent to hinder, delay or defraud an of its creditors.

It is understood and agreed that the representations and warranties set forth in this Section 2.04 shall survive delivery of the respective Mortgage Files to the Trustee or the applicable Custodian and shall inure to the benefit of the Trustee, notwithstanding any restrictive or qualified endorsement or assignment.

SECTION 2.05

Discovery of Breach; Repurchase or Substitution of Mortgage Loans; Representations and Warranties of Seller as to the Mortgage Loans.  

(a)

Upon discovery by the Depositor, the Seller or the related Originator or receipt of written notice of any materially defective document in, or, following the date of delivery to the Trustee of the applicable Custodian’s certifications as required under the related Custodial Agreements, that a document is missing from, a Trustee Mortgage File, or discovery by the Trustee, the Securities Administrator, the Depositor, the Seller or the related Originator of the breach by such Originator or Seller of any representation or warranty under the related Purchase and Servicing Agreement or Purchase Agreement, as applicable, as modified by the Acknowledgement, in the case of the Originator, or under this Agreement, in the case of the Seller, in respect of any Mortgage Loan which materially adversely affects the value of that Mortgage Loan or the interest therein of the Certificateholders (a "Defective Mortgage Loan") (each of the Depositor, the Seller and the related Originator hereby agreeing to give written notice thereof to the Trustee, the Securities Administrator and the other of such parties), the Securities Administrator, or its designee, shall promptly notify the Depositor, the Trustee and the Seller or the related Originator, as applicable, in writing of such defective or missing document or breach and request that the Seller or related Originator deliver such missing document or cure or cause the cure of such defect or breach within a period of time specified in the related Purchase and Servicing Agreement or Purchase Agreement, as applicable, and if the Trustee receives written notice that the Seller or related Originator, as applicable, has not delivered such missing document or cured such defect or breach in all material respects during such period, the Trustee, on behalf of the Trust, shall enforce the obligations of the related Originator under the related Purchase and Servicing Agreement or Purchase Agreement, as applicable, as modified by the Acknowledgement, or, to the extent that the related Originator fails to cure such defect or breach, the Seller under this Agreement, and shall cause the related Originator or the Seller, as the case may be, to repurchase that Mortgage Loan from the Trust Fund at the Purchase Price on or prior to the Determination Date following the expiration of such specified period (subject to Section 2.05(b) below); provided, however , that, in connection with any such breach that could not reasonably have been cured within such specified period (unless permitted a greater period of time to cure under the related Purchase and Servicing Agreement or Purchase Agreement, as applicable), subject to Section 2.05(c) below, if the related Originator or the Seller, as applicable, shall have commenced to cure such breach within such specified period, the related Originator or the Seller shall be permitted to proceed thereafter diligently and expeditiously to cure the same within such additional time as is reasonably determined by the Trustee to cure such breach.  To the extent that any costs and damages are incurred by the Trust Fund as a result of any violation of any applicable federal, state, or local predatory or abusive lending law arising from or in connection with the origination of any Mortgage Loan repurchased by the related Originator or the Seller, such costs and damages shall be included in the Purchase Price of such repurchased Mortgage Loan and shall be borne by the Seller.  The Purchase Price for the repurchased Mortgage Loan shall be deposited in the related Distribution Account, and the Trustee, or its designee, upon receipt of written certification from the Securities Administrator of such deposit, shall release or cause the applicable Custodian to release to the related Originator or the Seller, as applicable, the related Trustee Mortgage File and shall execute and deliver such instruments of transfer or assignment, in each case without recourse, representation or warranties, as either party shall furnish to it and as shall be necessary to vest in such party any Mortgage Loan released pursuant hereto and the Trustee, or its designee, shall have no further responsibility with regard to such Trustee Mortgage File (it being understood that the Trustee shall have no responsibility for determining the sufficiency of such assignment for its intended purpose).  If pursuant to the foregoing provisions the related Originator or the Seller repurchases a Mortgage Loan that is a MERS Mortgage Loan, the related Servicer shall cause MERS to designate on the MERS® System the related Originator or the Seller, as applicable, as the beneficial holder of such Mortgage Loan.

In lieu of repurchasing any such Mortgage Loan as provided above, either party may cause such Mortgage Loan to be removed from the Trust Fund (in which case it shall become a Deleted Mortgage Loan) and substitute one or more Replacement Mortgage Loans in the manner and subject to the limitations set forth in Section 2.05(b) below.  It is understood and agreed that the obligations of the Originators and the Seller to cure or to repurchase (or to substitute for) any related Mortgage Loan as to which a document is missing, a material defect in a constituent document exists or as to which such a breach has occurred and is continuing shall constitute the sole remedy against the such party respecting such omission, defect or breach available to the Trustee on behalf of the Certificateholders.

(b)

Any substitution of Replacement Mortgage Loans for Deleted Mortgage Loans made pursuant to Section 2.05(a) above must be effected prior to the last Business Day that is within two years after the Closing Date.  As to any Deleted Mortgage Loan for which the related Originator or the Seller substitutes a Replacement Mortgage Loan or Loans, such substitution shall be effected by delivering to the applicable Custodian, on behalf of the Trustee, for such Replacement Mortgage Loan or Loans, the Mortgage Note, the Mortgage, the Assignment to the Trustee, and such other documents and agreements, with all necessary endorsements thereon, together with an Officers’ Certificate stating that each such Replacement Mortgage Loan satisfies the definition thereof and specifying the Substitution Amount (as described below), if any, in connection with such substitution.  Monthly Payments due with respect to Replacement Mortgage Loans in the month of substitution shall not be included as part of the Trust Fund and shall be retained by the related Originator or the Seller, as applicable.  For the month of substitution, distributions to the Certificateholders shall reflect the collections and recoveries in respect of such Deleted Mortgage in the Due Period preceding the month of substitution and the related Originator or the Seller, as applicable, shall thereafter be entitled to retain all amounts subsequently received in respect of such Deleted Mortgage Loan.  Upon such substitution, such Replacement Mortgage Loan shall constitute part of the Trust Fund and shall be subject in all respects to the terms of this Agreement and the related Purchase and Servicing Agreement or Purchase Agreement, as applicable, as modified by the related Acknowledgement, including all representations and warranties thereof included in such Purchase and Servicing Agreement or Purchase Agreement, as applicable, as modified by the Acknowledgement, in each case as of the date of substitution.

For any month in which an Originator or the Seller substitutes one or more Replacement Mortgage Loans for one or more Deleted Mortgage Loans, the related Servicer shall determine the excess (each, a "Substitution Amount"), if any, by which the aggregate Purchase Price of all such Deleted Mortgage Loans exceeds the aggregate Stated Principal Balance of the Replacement Mortgage Loans replacing such Deleted Mortgage Loans, together with one month’s interest on such excess amount at the applicable Net Mortgage Rate.  On the date of such substitution, the related Originator or Seller, as applicable, shall deliver or cause to be delivered to the related Servicer for deposit in the related Custodial Account an amount equal to the related Substitution Amount, if any, and the applicable Custodian, on behalf of the Trustee, upon receipt of the related Replacement Mortgage Loan or Loans and certification by such Servicer of such deposit, shall release to the related Originator or the Seller, as applicable, the related Trustee Mortgage File or Files and shall execute and deliver such instruments of transfer or assignment, in each case without recourse, representation or warranty as the related Originator or Seller shall deliver to it and as shall be necessary to vest therein any Deleted Mortgage Loan released pursuant hereto.

In addition, the related Originator or the Seller, as applicable, shall obtain at its own expense and deliver to the Trustee and the Securities Administrator an Opinion of Counsel to the effect that such substitution (either specifically or as a class of transactions) shall not cause an Adverse REMIC Event.  If such Opinion of Counsel can not be delivered, then such substitution may only be effected at such time as the required Opinion of Counsel can be given.

(c)

Upon discovery by the related Originator, the Seller, the Depositor or the Trustee that any Mortgage Loan does not constitute a "qualified mortgage" within the meaning of Section 860G(a)(3) of the Code, the party discovering such fact shall within two (2) Business Days give written notice thereof to the other parties.  In connection therewith, the applicable party shall repurchase or, subject to the limitations set forth in Section 2.05(b), substitute one or more Replacement Mortgage Loans for the affected Mortgage Loan within 90 days of the earlier of discovery or receipt of such notice with respect to such affected Mortgage Loan.  Any such repurchase or substitution shall be made in the same manner as set forth in Section 2.05(a) above.  The Trustee shall re-convey to the related Originator or the Seller, as applicable, the Mortgage Loan to be released pursuant hereto in the same manner, and on the same terms and conditions, as it would a Mortgage Loan repurchased for breach of a representation or warranty.

(d)

Representations and Warranties of the Seller as to the Mortgage Loans .

The Seller hereby represents and warrants to the Trustee:

(i)

The representations and warranties of JPMCB with respect to the Chase Originators Mortgage Loans in the JPMCB Purchase and Servicing Agreement, which has been assigned to the Trustee, were made as of the applicable Bring-Down Date, as specified in the related Purchase and Servicing Agreement.  With respect to the Chase Originators Mortgage Loans and the period from such Bring-Down Date to and including the Closing Date, the Seller hereby makes the representations and warranties contained in Section 3.02 of the JPMCB Purchase and Servicing Agreement with respect to each of the Chase Originators Mortgage Loans to and for the benefit of the Depositor, the Trustee and the Trust Fund.

(ii)

The representations and warranties of CTX with respect to the CTX Mortgage Loans in the CTX Purchase Agreement, which has been assigned to the Trustee, were made as of the applicable Bring-Down Date, as specified in the CTX Purchase Agreement.  With respect to the CTX Mortgage Loans and the period from such Bring-Down Date to and including the Closing Date, the Seller hereby makes the representations and warranties contained in Section 7.01 of the CTX Purchase Agreement with respect to each of the CTX Mortgage Loans to and for the benefit of the Depositor, the Trustee and the Trust Fund.

(iii)

The representations and warranties of PHH with respect to the PHH Mortgage Loans in the PHH Purchase and Servicing Agreement, which has been assigned to the Trustee, were made as of the applicable Bring-Down Date, as specified in the PHH Purchase and Servicing Agreement.  With respect to the PHH Mortgage Loans and the period from such Bring-Down Date to and including the Closing Date, the Seller hereby makes the representations and warranties contained in clauses (4), (20), (21), (25), (31) and (57) of Section 3.03 of the PHH Purchase and Servicing Agreement with respect to each of the PHH Mortgage Loans to and for the benefit of the Depositor, the Trustee and the Trust Fund.

(iv)

The representations and warranties of GreenPoint with respect to the GreenPoint Mortgage Loans in the GreenPoint Purchase and Servicing Agreement, which has been assigned to the Trustee, were made as of the applicable Bring-Down Date, as specified in the GreenPoint Purchase and Servicing Agreement.  With respect to the GreenPoint Mortgage Loans and the period from such Bring-Down Date to and including the Closing Date, the Seller hereby makes the representations and warranties contained in Section 7.01 of the GreenPoint Purchase and Servicing Agreement with respect to each of the GreenPoint Mortgage Loans to and for the benefit of the Depositor, the Trustee and the Trust Fund.

(v)

The representations and warranties of SunTrust with respect to the SunTrust Mortgage Loans in the SunTrust Purchase and Servicing Agreement, which has been assigned to the Trustee, were made as of the applicable Bring-Down Date, as specified in the SunTrust Purchase and Servicing Agreement.  With respect to the SunTrust Mortgage Loans and the period from such Bring-Down Date to and including the Closing Date, the Seller hereby makes the representations and warranties contained in Section 7.01 of the SunTrust Purchase and Servicing Agreement with respect to each of the SunTrust Mortgage Loans to and for the benefit of the Depositor, the Trustee and the Trust Fund.

(vi)

The representations and warranties of WMMSC with respect to the WMMSC in the WMMSC Purchase and Servicing Agreement, which has been assigned to the Trustee, were made as of the applicable Bring-Down Date, as specified in the related Purchase and Servicing Agreement.  With respect to the WMMSC Mortgage Loans and the period from such Bring-Down Date to and including the Closing Date, the Seller hereby makes the representations and warranties contained in Section 3.2 of the WMMSC Purchase and Servicing Agreement with respect to each of the WMMSC Mortgage Loans to and for the benefit of the Depositor, the Trustee and the Trust Fund.

(vii)

The representations and warranties of National City with respect to the National City Mortgage Loans in the National City Purchase and Servicing Agreement, which has been assigned to the Trustee, were made as of the applicable Bring-Down Date, as specified in the related Purchase and Servicing Agreement.  With respect to the National City Mortgage Loans and the period from such Bring-Down Date to and including the Closing Date, the Seller hereby makes the representations and warranties contained in Section 3.02 of the National City Purchase and Servicing Agreement with respect to each of the National City Mortgage Loans to and for the benefit of the Depositor, the Trustee and the Trust Fund.

(viii)

The representations and warranties of Indymac with respect to the Indymac Mortgage Loans in the Indymac Purchase and Servicing Agreement, which has been assigned to the Trustee, were made as of the applicable Bring-Down Date, as specified in the Indymac Purchase and Servicing Agreement.  With respect to the Indymac Mortgage Loans and the period from such Bring-Down Date to and including the Closing Date, the Seller hereby makes the representations and warranties contained in Section 7.01 of the Indymac Purchase and Servicing Agreement with respect to each of the Indymac Mortgage Loans to and for the benefit of the Depositor, the Trustee and the Trust Fund.

(ix)

The representations and warranties of Countrywide with respect to the Countrywide Mortgage Loans in the Countrywide Purchase and Servicing Agreement, which has been assigned to the Trustee, were made as of the applicable Bring-Down Date, as specified in the related Purchase and Servicing Agreement.  With respect to the Countrywide Mortgage Loans and the period from such Bring-Down Date to and including the Closing Date, the Seller hereby makes the representations and warranties contained in Section 3.02 of the Countrywide Purchase and Servicing Agreement with respect to each of the Countrywide Mortgage Loans to and for the benefit of the Depositor, the Trustee and the Trust Fund.

(x)

The representations and warranties of Fifth Third with respect to the Fifth Third Mortgage Loans in the Fifth Third Purchase and Servicing Agreement, which have been assigned to the Trustee hereunder, were made as of the applicable Bring-Down Date.  With respect to the Fifth Third Mortgage Loans and the period from the applicable Bring-Down Date to and including the Closing Date, the Seller hereby makes the representations and warranties contained in Section 7.01 of the Fifth Third Purchase and Servicing Agreement with respect to each of the Fifth Third Mortgage Loans to and for the benefit of the Depositor, the Trustee and the Trust Fund.

(xi)

The Seller hereby represents and warrants that, as of the Closing Date, (i) no Mortgage Loan is subject to the Home Ownership and Equity Protection Act of 1994 or any applicable, similar federal, state or local statutes or regulations related to "high cost" mortgage loans or "predatory," "high cost," "threshold" or "covered" lending (as such terms are defined in the applicable statute or regulation); (ii) no Mortgage Loan is (w) a "High-Cost Home Loan" as defined in the New Jersey Home Ownership Act effective November 27, 2003, (x) a "High-Cost Home Loan" as defined in the New Mexico Home Loan Protection Act effective January 1, 2004, (y) a "High Cost Loan" or "Covered Loan" (as such terms are defined in the current S&P’s LEVELS® Glossary), or (z) governed by the Georgia Fair Lending Act, if such Mortgage Loan was originated on or after October 1, 2002 through March 6, 2003, (iii) each Mortgage Loan at origination complied in all material respects with applicable local, state and federal laws, including, but not limited to, applicable anti-predatory and abusive lending laws, and (iv) each Mortgage Loan is a "qualified mortgage" within the meaning of 860G(a)(3) of the Code.

(xii)

The Seller agrees to comply with the provisions of Section 2.05 in respect of a breach of any of such representations and warranties.

SECTION 2.06

Grant Clause.  

(a)

It is intended that the conveyance of the Depositor’s right, title and interest in and to property constituting the Trust Fund pursuant to this Agreement shall constitute, and shall be construed as, a sale of such property and not a grant of a security interest to secure a loan.  However, if such conveyance is deemed to be in respect of a loan, it is intended that: (1) the rights and obligations of the parties shall be established pursuant to the terms of this Agreement; (2) the Depositor hereby grants to the Trustee for the benefit of the Holders of the Certificates a first priority security interest in all of the Depositor’s right, title and interest in, to and under, whether now owned or hereafter acquired, the Trust Fund and all proceeds of any and all property constituting the Trust Fund to secure payment of the Certificates; and (3) this Agreement shall constitute a security agreement under applicable law.  If such conveyance is deemed to be in respect of a loan and the trust created by this Agreement terminates prior to the satisfaction of the claims of any Person holding any Certificate, the security interest created hereby shall continue in full force and effect and the Trustee shall be deemed to be the collateral agent for the benefit of such Person, and all proceeds shall be distributed as herein provided.

(b)

The Depositor shall, to the extent consistent with this Agreement, take such reasonable actions as may be necessary to ensure that, if this Agreement were deemed to create a security interest in the Mortgage Loans and the other property described above, such security interest would be deemed to be a perfected security interest of first priority under applicable law and will be maintained as such throughout the term of this Agreement.  The Depositor will, at its own expense, make all initial filings on or about the Closing Date and shall forward a copy of such filing or filings to the Trustee.  Without limiting the generality of the foregoing, the Depositor shall prepare and forward for filing, or shall cause to be forwarded for filing, at the expense of the Depositor, all filings necessary to maintain the effectiveness of any original filings necessary under the relevant UCC to perfect the Trustee’s security interest in or lien on the Mortgage Loans, including without limitation (x) continuation statements, and (y) such other statements as may be occasioned by (1) any change of name of an Originator, the Depositor or the Trustee, (2) any change of location of the place of business or the chief executive office of the Seller or the Depositor, (3) any transfer of any interest of an Originator or the Depositor in any Mortgage Loan or (4) any change under the relevant UCC or other applicable laws.  Neither the Originators nor the Depositor shall organize under the law of any jurisdiction other than the State under which each is organized as of the Closing Date (whether changing its jurisdiction of organization or organizing under an additional jurisdiction) without giving 30 days prior written notice of such action to its immediate and intermediate transferee, including the Trustee.  Before effecting such change, any Originator or the Depositor proposing to change its jurisdiction of organization shall prepare and file in the appropriate filing office any financing statements or other statements necessary to continue the perfection of the interests of its immediate and mediate transferees, including the Trustee, in the Mortgage Loans.  In connection with the transactions contemplated by this Agreement, each of the Originators and the Depositor authorizes its immediate or mediate transferee to file in any filing office any initial financing statements, any amendments to financing statements, any continuation statements, or any other statements or filings described in this paragraph (b), it being understood that such immediate or mediate transferees are under no obligation to make such filings.

SECTION 2.07

Swap Agreement.

The Depositor hereby directs the Securities Administrator to execute and deliver on behalf of the Swap Trust the Swap Agreement and authorizes the Securities Administrator to perform its obligations as Swap Trustee thereunder on behalf of the Swap Trust in accordance with the terms of the Swap Agreement.  The Depositor hereby authorizes and directs the Securities Administrator to ratify on behalf of the Swap Trust, as the Swap Trust’s own actions, the terms agreed to by the Depositor in relation to the Swap Agreement, as reflected in the Swap Agreement, and the Securities Administrator hereby so ratifies the Swap Agreement.  The Swap Trustee shall have no responsibility for the contents of such Swap Agreement, including, without limitation, the representations and warranties contained therein.  Notwithstanding anything to the contrary contained herein or in the Swap Agreement, neither the Swap Trustee nor the Securities Administrator shall be required to make any payments from its own funds to the Swap Provider.  If based upon a notice from the valuation agent pursuant to section 4(c) of the credit support annex, the Securities Administrator determines that a delivery amount exists, then the Securities Administrator shall demand such amount pursuant to section 3(a) of the credit support annex.  The Securities Administrator shall amend the Swap Agreement in accordance with its terms and as requested in writing by a party to the Swap Agreement to cure any ambiguity in or correct or supplement any provision of, the Swap Agreement; provided, however, that any such amendment will not have a material adverse effect to a Certificateholder as evidenced by a written confirmation from each Rating Agency that such amendment would not result in the reduction or withdrawal of the then current ratings of any outstanding Class of Certificates.  The Swap Agreement shall not be part of any REMIC.  The Swap Provider is the calculation agent under the Swap Agreement and shall calculate all amounts pursuant to the Swap Agreement and notify the Securities Administrator of all such amounts.

(a)

The Depositor hereby directs the Securities Administrator to execute, deliver and perform its obligations under the Swap Agreement on the Closing Date and thereafter on behalf of the Holders of the Certificates.  The Seller, the Depositor, the Servicer and the Holders of the Certificates by their acceptance of such Certificates acknowledge and agree that the Securities Administrator shall execute, deliver and perform its obligations under the Swap Agreement and shall do so solely in its capacity as Securities Administrator as Swap Trustee of the Swap Trust and not in its individual capacity.

(b)

The Depositor hereby instructs the Securities Administrator to make any and all demands for Eligible Collateral (as defined in the ISDA Master Agreement) under the Swap Agreement from the Swap Provider in satisfaction of the Delivery Amount (as defined in the ISDA Master Agreement) requirement.  The Depositor hereby instructs the Securities Administrator to deliver notice to the Swap Provider upon any failure of the Swap Provider to transfer the Delivery Amount (as defined in the ISDA Master Agreement) pursuant to an Approved Credit Support Document (as defined in the Swap Agreement).

ARTICLE III

THE CERTIFICATES

SECTION 3.01

The Certificates.  

(a)

The Certificates shall be issuable in registered form only and shall be securities governed by Article 8 of the New York Uniform Commercial Code.  The Uncertificated Interests shall be issuable as uncertificated securities in registered form only and shall be securities governed by Article 8 of the New York Uniform Commercial Code.  The Book-Entry Certificates will be evidenced by one or more certificates, beneficial ownership of which will be held in the dollar denominations in Certificate Principal Amount, or Notional Amount, as applicable, or in the Percentage Interests, specified herein.  Each Class of Book-Entry Certificates will be issued in the minimum denominations in Certificate Principal Amount (or Notional Amount) specified in the Preliminary Statement hereto and in integral multiples of $1 in excess thereof.  Each Class of Non-Book-Entry Certificates other than the Residual Certificates shall be issued in definitive, fully registered form in the minimum denominations in Certificate Principal Amount specified in the Preliminary Statement hereto and in integral multiples of $1 in excess thereof.  The Class A-R and Class P Certificates shall be issued as single Certificates and maintained in definitive, fully registered form in a denomination equal to 100% of the Percentage Interest of each such Class.  The Uncertificated Interest shall be issued as a single security and maintained in fully registered form in a denomination equal to 100% of the percentage interest of such interest.

(b)

The Certificates shall be executed by manual or facsimile signature on behalf of the Trustee by an authorized officer of the Trustee or of the Securities Administrator on its behalf.  Each Certificate shall, on original issue, be authenticated by the Authenticating Agent upon the written order of the Depositor upon receipt by the Trustee or a Custodian on behalf of the Trustee of the Trustee Mortgage Files described in Section 2.01.  No Certificate shall be entitled to any benefit under this Agreement, or be valid for any purpose, unless there appears on such Certificate a certificate of authentication substantially in the form provided for herein, executed by an authorized officer of the Authenticating Agent, by manual signature, and such certification upon any Certificate shall be conclusive evidence, and the only evidence, that such Certificate has been duly authenticated and delivered hereunder.  All Certificates shall be dated the date of their authentication.  At any time and from time to time after the execution and delivery of this Agreement, the Depositor may deliver Certificates executed by the Trustee or the Securities Administrator on behalf of the Trustee to the Authenticating Agent for authentication and the Authenticating Agent shall authenticate and deliver such Certificates as in this Agreement provided and not otherwise.

SECTION 3.02

Registration.  

The Securities Administrator is hereby appointed, and the Securities Administrator hereby accepts its appointment as, initial Certificate Registrar in respect of the Certificates and shall maintain books for the registration and for the transfer of Certificates and the Uncertificated Interest (the "Certificate Register").  The Trustee may appoint a bank or trust company to act as successor Certificate Registrar.  A registration book shall be maintained for the Certificates and the Uncertificated Interest collectively.  The Certificate Registrar may resign or be discharged or removed and a new successor may be appointed in accordance with the procedures and requirements set forth in Sections 6.06 and 6.07 hereof with respect to the resignation, discharge or removal of the Securities Administrator and the appointment of a successor Securities Administrator.  The Certificate Registrar may appoint, by a written instrument delivered to the Holders and the Master Servicer, any bank or trust company to act as co-registrar under such conditions as the Certificate Registrar may prescribe; provided, however , that the Certificate Registrar shall not be relieved of any of its duties or responsibilities hereunder by reason of such appointment.  The Certificate Register in respect of the Uncertificated Interest shall contain a statement that transfers of the Uncertificated Interest to a Disqualified Organization are prohibited as provided in this Agreement.

SECTION 3.03

Transfer and Exchange of Certificates.  

(a)

A Certificate (other than Book-Entry Certificates which shall be subject to Section 3.09 hereof) may be transferred by the Holder thereof only upon presentation and surrender of such Certificate at the office of the Certificate Registrar duly endorsed or accompanied by an assignment duly executed by such Holder or his duly authorized attorney in such form as shall be satisfactory to the Certificate Registrar.  Upon the transfer of any Certificate in accordance with the preceding sentence, the Trustee or the Securities Administrator on behalf of the Trustee shall execute, and the Authenticating Agent shall authenticate and deliver to the transferee, one or more new Certificates of the same Class and evidencing, in the aggregate, the same aggregate Certificate Principal Amount (or Notional Amount) as the Certificate being transferred.  An Uncertificated Interest may be transferred by the Holder thereof upon written notice to the Certificate Registrar and satisfaction of the other conditions set forth in this Section 3.03.  No service charge shall be made to a Certificateholder for any registration of transfer of Certificates, but the Certificate Registrar may require payment of a sum sufficient to cover any tax or governmental charge that may be imposed in connection with any registration of transfer of Certificates.

(b)

A Certificate may be exchanged by the Holder thereof for any number of new Certificates of the same Class, in authorized denominations, representing in the aggregate the same Certificate Principal Amount (or Notional Amount) as the Certificate surrendered, upon surrender of the Certificate to be exchanged at the office of the Certificate Registrar duly endorsed or accompanied by a written instrument of transfer duly executed by such Holder or his duly authorized attorney in such form as is satisfactory to the Certificate Registrar.  Certificates delivered upon any such exchange will evidence the same obligations, and will be entitled to the same rights and privileges, as the Certificates surrendered.  No service charge shall be made to a Certificateholder for any exchange of Certificates, but the Certificate Registrar may require payment of a sum sufficient to cover any tax or governmental charge that may be imposed in connection with any exchange of Certificates.  Whenever any Certificates are so surrendered for exchange, the Trustee, or the Securities Administrator on behalf of the Trustee, shall execute, and the Authenticating Agent shall authenticate, date and deliver the Certificates which the Certificateholder making the exchange is entitled to receive.

(c)

By acceptance of a Restricted Certificate, whether upon original issuance or subsequent transfer, each Holder of such a Certificate acknowledges the restrictions on the transfer of such Certificate set forth thereon and agrees that it will transfer such a Certificate only as provided herein.

The following restrictions shall apply with respect to the transfer and registration of transfer of a Restricted Certificate:

(i)

The Certificate Registrar shall register the transfer of a Restricted Certificate if the requested transfer is (x) to the Depositor or an affiliate (as defined in Rule 405 under the Act) of the Depositor or (y) being made to a "qualified institutional buyer" (a "QIB") as defined in Rule 144A under the Act by a transferor that has provided the Certificate Registrar with a certificate in the form of Exhibit H hereto; and

(ii)

The Certificate Registrar shall register the transfer of a Restricted Certificate if the requested transfer is being made to an "accredited investor" under Rule 501(a)(1), (2), (3) or (7) under the Act, or to any Person all of the equity owners in which are such accredited investors, by a transferor who furnishes to the Certificate Registrar a letter of the transferee substantially in the form of Exhibit I hereto.

(d)

No transfer of an ERISA-Restricted Certificate in the form of a Definitive Certificate or that is an Uncertificated Interest shall be made to any Person or shall be effective unless the Certificate Registrar, on behalf of the Trustee, has received (A) a certificate substantially in the form of Exhibit J hereto (or Exhibit B, in the case of a Residual Certificate) from such transferee or (B) an Opinion of Counsel satisfactory to the Trustee and the Certificate Registrar to the effect that the purchase and holding of such a Certificate will not constitute or result in any nonexempt prohibited transactions under Title I of ERISA or Section 4975 of the Code and will not subject the Certificate Registrar, the Trustee, the Master Servicer, any Servicer, the Depositor or the Securities Administrator to any obligation in addition to those undertaken in the Agreement; provided, however , that the Certificate Registrar will not require such certificate or opinion in the event that, as a result of a change of law or otherwise, counsel satisfactory to the Certificate Registrar has rendered an opinion to the effect that the purchase and holding of an ERISA-Restricted Certificate by an employee benefit plan or other retirement arrangement subject to Section 406 of ERISA, or Section 4975 of the Code, (collectively, a "Plan") or a Person that is purchasing or holding such a Certificate with the assets of a Plan will not constitute or result in a prohibited transaction under Title I of ERISA or Section 4975 of the Code and will not subject the Certificate Registrar, the Trustee, the Master Servicer, the Depositor, the Securities Administrator or any Servicer to any obligation in addition to those undertaken in this Agreement.  Each Transferee of an ERISA-Restricted Certificate that is a Book-Entry Certificate shall be deemed to have made the representations set forth in Exhibit J.  The preparation and delivery of the certificate and opinions referred to above shall not be an expense of the Trust Fund, the Certificate Registrar, the Trustee, the Master Servicer, any Servicer the Depositor or the Securities Administrator.

Notwithstanding the foregoing, no opinion or certificate shall be required for the initial transfer of the ERISA-Restricted Certificates.  The Certificate Registrar shall have no obligation to monitor transfers of Book-Entry Certificates that are ERISA-Restricted Certificates and shall have no liability for transfers of such Certificates in violation of the transfer restrictions.  The Certificate Registrar shall be under no liability to any Person for any registration of transfer of any ERISA-Restricted Certificate that is in fact not permitted by this Section 3.03(d) and none of the Securities Administrator, the Trustee or the Paying Agent shall have any liability for making any payments due on such Certificate to the Holder thereof or taking any other action with respect to such Holder under the provisions of this Agreement so long as the transfer was registered by the Certificate Registrar in accordance with the foregoing requirements.  The Securities Administrator, on behalf of the Trustee, shall be entitled, but not obligated, to recover from any Holder of any ERISA-Restricted Certificate that was in fact a Plan or a Person acting on behalf of a Plan any payments made on such ERISA-Restricted Certificate at and after either such time.  Any such payments so recovered by the Securities Administrator, on behalf of the Trustee, shall be paid and delivered by the Securities Administrator, on behalf of the Trustee, to the last preceding Holder of such Certificate that is not such a Plan or Person acting on behalf of a Plan.

(e)

No transfer of an ERISA-Restricted Swap Certificate prior to the termination of the Swap Agreement shall be made unless the Securities Administrator and the Trustee shall have received a representation letter from the transferee of such Certificate, substantially in the form set forth in Exhibit J, to the effect that either (i) such transferee is neither a Plan nor a Person acting on behalf of any such Plan or using the assets of any such Plan to effect such transfer or (ii) the acquisition and holding of the ERISA-Restricted Swap Certificate are eligible for exemptive relief under Prohibited Transaction Class Exemption ("PTCE") 84-14, PTCE 90-1, PTCE 91-38, PTCE 95-60, PTCE 96-23 or the non-fiduciary service provider exemption under Section 408(b)(17) of ERISA.  Notwithstanding anything else to the contrary herein, any purported transfer of an ERISA-Restricted Swap Certificate on behalf of a Plan without the delivery to the Securities Administrator and Trustee of a representation letter as described above shall be void and of no effect.  If the ERISA-Restricted Swap Certificate is a Book-Entry Certificate, the transferee will be deemed to have made a representation as provided in clause (i) or (ii) of this paragraph, as applicable.

If any ERISA-Restricted Swap Certificate, or any interest therein, is acquired or held in violation of the provisions of the preceding paragraph, the next preceding permitted beneficial owner will be treated as the beneficial owner of that Certificate, retroactive to the date of transfer to the purported beneficial owner.  Any purported beneficial owner whose acquisition or holding of an ERISA-Restricted Swap Certificate, or interest therein, was effected in violation of the provisions of the preceding paragraph shall indemnify to the extent permitted by law and hold harmless the Trustee, the Securities Administrator, the Depositor, the Seller or the Servicer from and against any and all liabilities, claims, costs or expenses incurred by such parties as a result of such acquisition or holding.

To the extent permitted under applicable law (including, but not limited to, ERISA), the Securities Administrator shall be under no liability to any Person for any registration of transfer of any ERISA-Restricted Swap Certificate that is in fact not permitted by this Section 5.02(e) or for making any payments due on such Certificate to the Holder thereof or taking any other action with respect to such Holder under the provisions of this Agreement so long as the transfer was registered by the Securities Administrator in accordance with the foregoing requirements.

(f)

As a condition of the registration of transfer or exchange of any Certificate, the Certificate Registrar may require the certified taxpayer identification number of the owner of the Certificate and the payment of a sum sufficient to cover any tax or other governmental charge imposed in connection therewith; provided, however , that the Certificate Registrar shall have no obligation to require such payment or to determine whether or not any such tax or charge may be applicable.  No service charge shall be made to the Certificateholder for any registration, transfer or exchange of a Certificate.

(g)

Notwithstanding anything to the contrary contained herein, no Residual Certificate may be owned, pledged or transferred, directly or indirectly, by or to (i) a Disqualified Organization or (ii) an individual, corporation or partnership or other person unless such person is (A) not a Non-U.S. Person or (B) is a Non-U.S. Person that holds a Residual Certificate in connection with the conduct of a trade or business within the United States and has furnished the transferor and the Certificate Registrar with an effective Internal Revenue Service Form W 8ECI or successor form at the time and in the manner required by the Code (any such person who is not covered by clause (A) or (B) above is referred to herein as a "Non-permitted Foreign Holder").

Prior to and as a condition of the registration of any transfer, sale or other disposition of a Residual Certificate, the proposed transferee shall deliver to the Trustee and the Certificate Registrar an affidavit in substantially the form attached hereto as Exhibit B representing and warranting, among other things, that such transferee is neither a Disqualified Organization, an agent or nominee acting on behalf of a Disqualified Organization, nor a Non-permitted Foreign Holder (any such transferee, a "Permitted Transferee"), and the proposed transferor shall deliver to the Trustee and the Certificate Registrar an affidavit in substantially the form attached hereto as Exhibit C.  In addition, the Trustee or the Certificate Registrar may (but shall have no obligation to) require, prior to and as a condition of any such transfer, the delivery by the proposed transferee of an Opinion of Counsel, addressed to the Trustee and the Certificate Registrar, that such proposed transferee or, if the proposed transferee is an agent or nominee, the proposed beneficial owner, is not a Disqualified Organization, agent or nominee thereof, or a Non-permitted Foreign Holder.  Notwithstanding the registration in the Certificate Register of any transfer, sale, or other disposition of a Residual Certificate to a Disqualified Organization, an agent or nominee thereof, or Non-permitted Foreign Holder, such registration shall be deemed to be of no legal force or effect whatsoever and such Disqualified Organization, agent or nominee thereof, or Non-permitted Foreign Holder shall not be deemed to be a Certificateholder for any purpose hereunder, including, but not limited to, the receipt of distributions on such Residual Certificate.  The Depositor, the Certificate Registrar and the Trustee shall be under no liability to any Person for any registration or transfer of a Residual Certificate to a Disqualified Organization, agent or nominee thereof or Non-permitted Foreign Holder or for the Paying Agent making any payments due on such Residual Certificate to the Holder thereof or for taking any other action with respect to such Holder under the provisions of the Agreement, so long as the transfer was effected in accordance with this Section 3.03(f), unless the Certificate Registrar shall have actual knowledge at the time of such transfer or the time of such payment or other action that the transferee is a Disqualified Organization, or an agent or nominee thereof, or Non-permitted Foreign Holder.  The Certificate Registrar shall be entitled to recover from any Holder of a Residual Certificate that was a Disqualified Organization, agent or nominee thereof, or Non-permitted Foreign Holder at the time it became a Holder or any subsequent time it became a Disqualified Organization, agent or nominee thereof, or Non-permitted Foreign Holder, all payments made on such Residual Certificate at and after either such times (and all costs and expenses, including but not limited to attorneys’ fees, incurred in connection therewith).  Any payment (not including any such costs and expenses) so recovered by the Certificate Registrar shall be paid and delivered to the last preceding Holder of such Residual Certificate.

If any purported transferee shall become a registered Holder of a Residual Certificate in violation of the provisions of this Section 3.03(f), then upon receipt of written notice to the Certificate Registrar that the registration of transfer of such Residual Certificate was not in fact permitted by this Section 3.03(f), the last preceding Permitted Transferee shall be restored to all rights as Holder thereof retroactive to the date of such registration of transfer of such Residual Certificate.  The Depositor, the Certificate Registrar and the Trustee shall be under no liability to any Person for any registration of transfer of a Residual Certificate that is in fact not permitted by this Section 3.03(f), or for the Paying Agent making any payment due on such Certificate to the registered Holder thereof or for taking any other action with respect to such Holder under the provisions of this Agreement so long as the transfer was registered upon receipt of the affidavit described in the preceding paragraph of this Section 3.03(f).

(h)

Each Holder or Certificate Owner of a Restricted Certificate, ERISA-Restricted Certificate, ERISA-Restricted Swap Certificate, or Residual Certificate, or an interest therein, by such Holder’s or Owner’s acceptance thereof, shall be deemed for all purposes to have consented to the provisions of this section.

SECTION 3.04

Cancellation of Certificates.  

Any Certificate surrendered for registration of transfer or exchange shall be cancelled and retained in accordance with normal retention policies with respect to cancelled certificates maintained by the Certificate Registrar.

SECTION 3.05

Replacement of Certificates.  

If (i) any Certificate is mutilated and is surrendered to the Certificate Registrar or (ii) the Trustee or the Certificate Registrar receives evidence to its satisfaction of the destruction, loss or theft of any Certificate, and there is delivered to the Trustee and the Certificate Registrar such security or indemnity as may be required by them to save each of them harmless, then, in the absence of notice to the Depositor, the Trustee or the Certificate Registrar that such destroyed, lost or stolen Certificate has been acquired by a protected purchaser the Trustee, or the Securities Administrator on behalf of the Trustee, shall execute and the Authenticating Agent shall authenticate and deliver, in exchange for or in lieu of any such mutilated, destroyed, lost or stolen Certificate, a new Certificate of like tenor and Certificate Principal Amount.  Upon the issuance of any new Certificate under this Section 3.05, the Trustee, the Depositor or the Certificate Registrar may require the payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in relation thereto and any other expenses (including the fees and expenses of the Trustee, the Depositor or the Certificate Registrar) connected therewith.  Any replacement Certificate issued pursuant to this Section 3.05 shall constitute complete and indefeasible evidence of ownership in the applicable Trust Fund, as if originally issued, whether or not the lost, stolen or destroyed Certificate shall be found at any time.

If after the delivery of such new Certificate, a protected purchaser of the original Certificate in lieu of which such new Certificate was issued presents for payment such original Certificate, the Depositor, the Certificate Registrar and the Trustee or any agent shall be entitled to recover such new Certificate from the Person to whom it was delivered or any Person taking therefrom, except a protected purchaser, and shall be entitled to recover upon the security or indemnity provided therefor to the extent of any loss, damage, cost or expenses incurred by the Depositor, the Certificate Registrar, the Trustee or any agent in connection therewith.

SECTION 3.06

Persons Deemed Owners.  

Subject to the provisions of Section 3.09 with respect to Book-Entry Certificates, the Depositor, the Master Servicer, the Trustee, the Certificate Registrar, the Paying Agent and any agent of any of them shall treat the Person in whose name any Certificate is registered upon the books of the Certificate Registrar as the owner of such Certificate for the purpose of receiving distributions pursuant to Sections 5.01 and 5.02 and for all other purposes whatsoever, and neither the Depositor, the Master Servicer, the Trustee, the Certificate Registrar, the Paying Agent nor any agent of any of them shall be affected by notice to the contrary.

SECTION 3.07

Temporary Certificates.  

(a)

Pending the preparation of definitive Certificates, upon the written order of the Depositor, the Trustee, or the Securities Administrator on behalf of the Trustee, shall execute and the Authenticating Agent shall authenticate and deliver temporary Certificates that are printed, lithographed, typewritten, mimeographed or otherwise produced, in any authorized denomination, substantially of the tenor of the definitive Certificates in lieu of which they are issued and with such variations as the authorized officers executing such Certificates may determine, as evidenced by their execution of such Certificates.

(b)

If temporary Certificates are issued, the Depositor will cause definitive Certificates to be prepared without unreasonable delay.  After the preparation of definitive Certificates, the temporary Certificates shall be exchangeable for definitive Certificates upon surrender of the temporary Certificates at the office or agency of the Certificate Registrar without charge to the Holder.  Upon surrender for cancellation of any one or more temporary Certificates, the Securities Administrator, on behalf of the Trustee, shall execute and the Authenticating Agent shall authenticate and deliver in exchange therefor a like aggregate Certificate Principal Amount of definitive Certificates of the same Class in the authorized denominations.  Until so exchanged, the temporary Certificates shall in all respects be entitled to the same benefits under this Agreement as definitive Certificates of the same Class.

SECTION 3.08

Appointment of Paying Agent.  

The Trustee may appoint a Paying Agent (which may be the Trustee) for the purpose of making distributions to the Certificateholders hereunder.  The Trustee hereby appoints the Securities Administrator as the initial Paying Agent.  The Trustee shall cause any Paying Agent, other than the Securities Administrator, to execute and deliver to the Trustee an instrument in which such Paying Agent shall agree with the Trustee that such Paying Agent will hold all sums held by it for the payment to the Certificateholders in an Eligible Account (which shall be the Distribution Account) in trust for the benefit of the Certificateholders entitled thereto until such sums shall be paid to the Certificateholders.  All funds remitted by the Securities Administrator to any such Paying Agent for the purpose of making distributions shall be paid to the Certificateholders on each Distribution Date and any amounts not so paid shall be returned on such Distribution Date to the Securities Administrator.  If the Paying Agent is not the Trustee or the Securities Administrator, the Trustee shall cause to be remitted to the Paying Agent on or before the Business Day prior to each Distribution Date, by wire transfer in immediately available funds, the funds to be distributed on such Distribution Date.  Any Paying Agent shall be either a bank or trust company or otherwise authorized under law to exercise corporate trust powers.

SECTION 3.09

Book-Entry Certificates.  

(a)

Each Class of Book-Entry Certificates, upon original issuance, shall be issued in the form of one or more typewritten Certificates representing the Book-Entry Certificates.  The Book-Entry Certificates shall initially be registered on the Certificate Register in the name of the nominee of the Clearing Agency, and no Certificate Owner will receive a definitive certificate representing such Certificate Owner’s interest in the Book-Entry Certificates, except as provided in Section 3.09(c).  Unless Definitive Certificates have been issued to Certificate Owners of Book-Entry Certificates pursuant to Section 3.09(c):

(i)

the provisions of this Section 3.09 shall be in full force and effect;

(ii)

the Certificate Registrar, the Paying Agent and the Trustee shall deal with the Clearing Agency for all purposes (including the making of distributions on the Book-Entry Certificates) as the authorized representatives of the Certificate Owners and the Clearing Agency and shall be responsible for crediting the amount of such distributions to the accounts of such Persons entitled thereto, in accordance with the Clearing Agency’s normal procedures;

(iii)

to the extent that the provisions of this Section 3.09 conflict with any other provisions of this Agreement, the provisions of this Section 3.09 shall control; and

(iv)

the rights of Certificate Owners shall be exercised only through the Clearing Agency and the Clearing Agency Participants and shall be limited to those established by law and agreements between such Certificate Owners and the Clearing Agency and/or the Clearing Agency Participants.  Unless and until Definitive Certificates are issued pursuant to Section 3.09(c), the initial Clearing Agency will make book-entry transfers among the Clearing Agency Participants and receive and transmit distributions of principal and interest on the Book-Entry Certificates to such Clearing Agency Participants.

(b)

Whenever notice or other communication to the Certificateholders is required under this Agreement, unless and until Definitive Certificates shall have been issued to Certificate Owners pursuant to Section 3.09(c), the Securities Administrator shall give all such notices and communications specified herein to be given to Holders of the Book-Entry Certificates to the Clearing Agency.

(c)

If (i) (A) the Clearing Agency or the Depositor advises the Paying Agent in writing that the Clearing Agency is no longer willing or able to discharge properly its responsibilities with respect to the Book-Entry Certificates, and (B) the Depositor is unable to locate a qualified successor satisfactory to the Depositor and the Paying Agent, (ii) the Depositor, at its option, advises the Paying Agent in writing that it elects to terminate the book-entry system through the Clearing Agency or (iii) after the occurrence of an Event of Default, Certificate Owners representing beneficial interests aggregating not less than 50% of the Class Principal Amount of a Class of Book-Entry Certificates advise the Paying Agent and the Clearing Agency through the Clearing Agency Participants in writing that the continuation of a book-entry system through the Clearing Agency is no longer in the best interests of the Certificate Owners of a Class of Book-Entry Certificates, the Certificate Registrar shall notify the Clearing Agency to effect notification to all Certificate Owners, through the Clearing Agency, of the occurrence of any such event and of the availability of Definitive Certificates to Certificate Owners requesting the same.  Upon surrender to the Certificate Registrar of the Book-Entry Certificates by the Clearing Agency, accompanied by registration instructions from the Clearing Agency for registration, the Certificate Registrar shall issue the Definitive Certificates.  Neither the Depositor, the Certificate Registrar nor the Trustee shall be liable for any delay in delivery of such instructions and may conclusively rely on, and shall be protected in relying on, such instructions.  Upon the issuance of Definitive Certificates all references herein to obligations imposed upon or to be performed by the Clearing Agency shall be deemed to be imposed upon and performed by the Certificate Registrar, to the extent applicable, with respect to such Definitive Certificates and the Certificate Registrar shall recognize the holders of the Definitive Certificates as Certificateholders hereunder.  Notwithstanding the foregoing, the Certificate Registrar, upon the written instruction of the Depositor, shall have the right to issue Definitive Certificates on the Closing Date in connection with credit enhancement programs.

ARTICLE IV

ADMINISTRATION OF THE TRUST FUND

SECTION 4.01

Custodial Accounts; Distribution Account.  

(a)

The Master Servicer shall enforce the obligations of each Servicer to establish and maintain one or more Custodial Accounts, as provided in the related Purchase and Servicing Agreement or Servicing Agreement, as applicable, into which all Scheduled Payments and unscheduled payments with respect to the related Mortgage Loans, net of any deductions or reimbursements permitted under the related Purchase and Servicing Agreement, shall be deposited.  On each Distribution Account Deposit Date, the Servicers shall remit to the Securities Administrator for deposit into the Distribution Account, all amounts so required to be deposited into such account in accordance with the terms of the related Purchase and Servicing Agreements or Servicing Agreement, as applicable.

(b)

The Securities Administrator, as Paying Agent for the Trustee, shall establish and maintain an Eligible Account entitled "Distribution Account of U.S. Bank National Association, as Trustee for the benefit of J.P. Morgan Alternative Loan Trust 2006-S4, Holders of Mortgage Pass-Through Certificates."  The Securities Administrator shall, promptly upon receipt from each Servicer, on each Distribution Account Deposit Date, deposit into the Distribution Account and retain on deposit until the related Distribution Date the following amounts:

(i)

the aggregate of collections with respect to the Mortgage Loans remitted by each  Servicer from the related Custodial Accounts in accordance with this Agreement and the related Purchase and Servicing Agreements and Servicing Agreements;

(ii)

any amounts required to be deposited by the Master Servicer with respect to the Mortgage Loans for the related Due Period pursuant to this Agreement, including the amount of any Advances or Compensating Interest Payments with respect to the Mortgage Loans not paid by the applicable Servicer; and

(iii)

any other amounts so required to be deposited in the Distribution Account in the related Due Period pursuant to this Agreement.

(c)

In the event the Master Servicer or any Servicer, has remitted in error to the Distribution Account any amount not required to be remitted in accordance with the definition of Available Distribution Amount, it may at any time direct the Securities Administrator to withdraw such amount from the Distribution Account for repayment to the Master Servicer or such Servicer, as applicable, by delivery of an Officer’s Certificate to the Securities Administrator and the Trustee which describes the amount deposited in error.

(d)

On each Distribution Date and Redemption Date, the Securities Administrator, as Paying Agent, shall withdraw from funds available in the Distribution Account and distribute the Available Distribution Amount to the Certificateholders and any other parties entitled thereto in the amounts and priorities set forth in Section 5.02.  The Securities Administrator may from time to time withdraw from the Distribution Account and pay the Master Servicer, the Trustee, the Securities Administrator or any Servicer any amounts permitted to be paid or reimbursed to such Person from funds in the Distribution Account pursuant to the clauses (A) through (D) of the definition of Available Distribution Amount.

(e)

Funds in the Distribution Account may be invested in Permitted Investments selected by and at the written direction of the Master Servicer, which shall mature not later than one (1) Business Day prior to the Distribution Date (except that if such Permitted Investment is an obligation of the Master Servicer, then such Permitted Investment shall mature not later than such applicable Distribution Date) and any such Permitted Investment shall not be sold or disposed of prior to its maturity.  All such Permitted Investments shall be made in the name of the Trustee (in its capacity as such) or its nominee.  All income and gain realized from any Permitted Investment shall be for the benefit of the Master Servicer, as additional compensation for its duties hereunder, and shall be subject to its withdrawal or order from time to time, and shall not be part of the Trust Fund; provided, however, that the Master Servicer shall only be entitled to four days of such investment income..  The amount of any losses incurred in respect of any such investments shall be deposited in such Distribution Account by the Master Servicer out of its own funds, without any right of reimbursement therefor, immediately as realized.

SECTION 4.02

[Reserved].  

SECTION 4.03

[Reserved].  

SECTION 4.04

Reports to Trustee and Certificateholders.  

On each Distribution Date, the Securities Administrator shall have prepared and shall make available to the Trustee, the Depositor and each Certificateholder a written report setting forth the following information (on the basis of Mortgage Loan level information obtained from each Servicer or the Master Servicer):

(a)

the amount of the distributions, separately identified, with respect to each Class of Certificates;

(b)

the amount of the distributions set forth in the clause (a) allocable to principal, separately identifying the aggregate amount of any Principal Prepayments or other unscheduled recoveries of principal included in that amount;

(c)

the amount of the distributions set forth in the clause (a) allocable to interest and how it was calculated;

(d)

the amount of any unpaid Interest Shortfall and the related accrued interest thereon, with respect to each Class of Certificates;

(e)

the Class Principal Amount of each Class of Certificates after giving effect to the distribution of principal on that Distribution Date;

(f)

the Aggregate Stated Principal Balance of the Mortgage Loans at the end of the related Prepayment Period;

(g)

the amount of the Servicing Fee paid to or retained by Servicer;

(h)

the amount of the Master Servicing Fee paid to or retained by Master Servicer;

(i)

the amount of Advances for the related Due Period;

(j)

the number and Stated Principal Balance of the Mortgage Loans that, using the MBA method, were (A) Delinquent (exclusive of Mortgage Loans in foreclosure using the MBA method) (1) 30 to 59 days, (2) 60 to 89 days and (3) 90 or more days, (B) in foreclosure and Delinquent (1) 30 to 59 days, (2) 60 to 89 days and (3) 90 or more days and (C) in bankruptcy as of the close of business on the last day of the calendar month preceding that Distribution Date;

(k)

for any Mortgage Loan as to which the related Mortgaged Property was an REO Property during the preceding calendar month, the principal balance of that Mortgage Loan as of the close of business on the last day of the related Due Period;

(l)

the amount of Realized Losses incurred during the preceding calendar month;

(m)

the cumulative amount of Realized Losses incurred since the Closing Date;

(n)

the Realized Losses, if any, allocated to each Class of Certificates on that Distribution Date;

(o)

the Certificate Interest Rate for each Class of Certificates for that Distribution Date;

(p)

the amount of any prepayment penalties on the Mortgage Loans;

(q)

the beginnin