POOLING AND SERVICING AGREEMENT

Pooling and Servicing Agreement

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DEUTSCHE BANK NATIONAL TRUST COMPANY | DEUTSCHE BANK TRUST COMPANY | GREENWICH CAPITAL ACCEPTANCE, INC | THORNBURG MORTGAGE HOME LOANS, INC | WELLS FARGO BANK, NA

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Title: POOLING AND SERVICING AGREEMENT
Governing Law: Delaware Date: 4/12/2005

POOLING AND SERVICING AGREEMENT, Parties: deutsche bank national trust company , deutsche bank trust company , greenwich capital acceptance inc , thornburg mortgage home loans inc , wells fargo bank na

GREENWICH CAPITAL ACCEPTANCE, INC.,
Depositor

THORNBURG MORTGAGE HOME LOANS, INC.,
Seller

WELLS FARGO BANK, N.A.,
Master Servicer and

Securities Administrator

DEUTSCHE BANK TRUST COMPANY DELAWARE,

Delaware Trustee

and

DEUTSCHE BANK NATIONAL TRUST COMPANY,
Trustee and Custodian

POOLING AND SERVICING AGREEMENT

Dated as of March 1, 2005

__________________________________

Thornburg Mortgage Securities Trust 2005-1

Mortgage Loan Pass-Through Certificates, Series 2005-1

Table of Contents

Page

ARTICLE I DEFINITIONS; DECLARATION OF TRUST

SECTION 1.01. Defined Terms.

SECTION 1.02. Accounting.

ARTICLE IA ORGANIZATION

Section 1A.01. Name of Trust

Section 1A.02. Office

Section 1A.03. Declaration of Trust

Section 1A.04. Purpose and Powers

Section 1A.05. Liability of the Certificateholders

Section 1A.06. Title To Trust Property

Section 1A.07. Situs of Trust

Section 1A.08. The Delaware Trustee

Section 1A.09 Separateness Provisions

ARTICLE II CONVEYANCE OF MORTGAGE LOANS; ORIGINAL ISSUANCE OF

CERTIFICATES

SECTION 2.01. Conveyance of Mortgage Loans.

SECTION 2.02. Acceptance by Trustee.

SECTION 2.03. Repurchase or Substitution of Mortgage Loans by the Seller.

SECTION 2.04. Representations and Warranties of the Seller with Respect to the Mortgage

Loans.

SECTION 2.05. [Reserved].

SECTION 2.06. Representations and Warranties of the Depositor.

SECTION 2.07. Issuance of Certificates.

SECTION 2.08. Representations and Warranties of the Seller.

SECTION 2.09. Covenants of the Seller.

ARTICLE III ADMINISTRATION AND SERVICING OF THE MORTGAGE LOANS

SECTION 3.01. Master Servicer to Service and Administer the Mortgage Loans.

SECTION 3.02. REMIC-Related Covenants.

SECTION 3.03. Monitoring of Servicers.

SECTION 3.04. Fidelity Bond.

SECTION 3.05. Power to Act; Procedures.

SECTION 3.06. Due-on-Sale Clauses; Assumption Agreements.

SECTION 3.07. Release of Mortgage Files.

SECTION 3.08. Documents, Records and Funds in Possession of Master Servicer To Be

Held for Trust.

SECTION 3.09. Standard Hazard Insurance and Flood Insurance Policies.

SECTION 3.10. Presentment of Claims and Collection of Proceeds.

SECTION 3.11. Maintenance of the Primary Insurance Policies.

SECTION 3.12. Trustee to Retain Possession of Certain Insurance Policies and Documents.

SECTION 3.13. Realization Upon Defaulted Mortgage Loans.

SECTION 3.14. Additional Compensation to the Master Servicer.

SECTION 3.15. REO Property.

SECTION 3.16. Annual Officer’s Certificate as to Compliance.

SECTION 3.17. Annual Independent Accountant’s Servicing Report.

SECTION 3.18. Reports Filed with Securities and Exchange Commission.

SECTION 3.19. Amendments to Master Servicing Guide and Correspondent Sellers Guide.

SECTION 3.20. UCC.

SECTION 3.21. Optional Purchase of Certain Mortgage Loans.

SECTION 3.22. Realization upon Troubled Mortgage Loans.

SECTION 3.23. Closing Certificate and Opinion.

SECTION 3.24. Liabilities of the Master Servicer.

SECTION 3.25. Merger or Consolidation of the Master Servicer.

SECTION 3.26. Indemnification of the Trustee, the Delaware Trustee, the Master Servicer

and the Securities Administrator.

SECTION 3.27. Limitations on Liability of the Master Servicer and Others.

SECTION 3.28. Master Servicer Not to Resign.

SECTION 3.29. Successor Master Servicer.

SECTION 3.30. Sale and Assignment of Master Servicing.

SECTION 3.31. Reporting Requirements of the Commission.

ARTICLE IV ACCOUNTS

SECTION 4.01. Servicing Accounts.

SECTION 4.02. Collection Account.

SECTION 4.03. Permitted Withdrawals and Transfers from the Collection Account.

SECTION 4.04. Distribution Account.

SECTION 4.05. Permitted Withdrawals and Transfers from the Distribution Account.

ARTICLE V FLOW OF FUNDS

SECTION 5.01. Distributions.

SECTION 5.02. [Reserved].

SECTION 5.03. Allocation of Realized Losses.

SECTION 5.04. Statements.

SECTION 5.05. Remittance Reports; Advances.

SECTION 5.06. Compensating Interest Payments.

SECTION 5.07. Recoveries.

ARTICLE VI THE CERTIFICATES

SECTION 6.01. The Certificates.

SECTION 6.02. Registration of Transfer and Exchange of Certificates.

SECTION 6.03. Mutilated, Destroyed, Lost or Stolen Certificates.

100

SECTION 6.04. Persons Deemed Owners.

100

SECTION 6.05. Appointment of Paying Agent.

100

ARTICLE VII DEFAULT

101

SECTION 7.01. Event of Default.

101

SECTION 7.02. Trustee to Act.

103

SECTION 7.03. Waiver of Event of Default.

104

SECTION 7.04. Notification to Certificateholders.

104

ARTICLE VIII THE TRUSTEE AND THE SECURITIES ADMINISTRATOR

105

SECTION 8.01. Duties of Trustee and Securities Administrator.

105

SECTION 8.02. Certain Matters Affecting the Trustee and the Securities Administrator.

106

SECTION 8.03. Trustee and the Securities Administrator Not Liable for Certificates,

Mortgage Loans or Additional Collateral.

108

SECTION 8.04. Trustee, Custodian, Delaware Trustee, Master Servicer and Securities

Administrator May Own Certificates.

109

SECTION 8.05. Trustee’s, Delaware Trustee’s and Securities Administrator’s Fees and

Expenses.

109

SECTION 8.06. Eligibility Requirements for Trustee.

110

SECTION 8.07. Resignation or Removal of Trustee and Securities Administrator.

110

SECTION 8.08. Successor Trustee and Successor Securities Administrator.

111

SECTION 8.09. Merger or Consolidation of Trustee or Securities Administrator.

112

SECTION 8.10. Appointment of Co-Trustee or Separate Trustee.

112

SECTION 8.11. Limitation of Liability.

113

SECTION 8.12. Trustee May Enforce Claims Without Possession of Certificates.

113

SECTION 8.13. Suits for Enforcement.

114

SECTION 8.14. Waiver of Bond Requirement.

114

SECTION 8.15. Waiver of Inventory, Accounting and Appraisal Requirement.

114

SECTION 8.16. Appointment of Custodians.

114

ARTICLE IX REMIC ADMINISTRATION

115

SECTION 9.01. REMIC Administration.

115

SECTION 9.02. Prohibited Transactions and Activities.

117

ARTICLE X TERMINATION

117

SECTION 10.01. Termination.

117

SECTION 10.02. Additional Termination Requirements.

119

ARTICLE XI DISPOSITION OF TRUST ASSETS

119

SECTION 11.01. Disposition of Trust Assets.

119

ARTICLE XII MISCELLANEOUS PROVISIONS

119

SECTION 12.01. Amendment.

119

SECTION 12.02. Recordation of Agreement; Counterparts.

121

SECTION 12.03. Limitation on Rights of Certificateholders.

121

SECTION 12.04. Governing Law; Jurisdiction.

122

SECTION 12.05. Notices.

122

SECTION 12.06. Severability of Provisions.

123

SECTION 12.07. Article and Section References.

123

SECTION 12.08. Notice to the Rating Agency.

123

SECTION 12.09. Further Assurances.

124

SECTION 12.10. Benefits of Agreement.

124

SECTION 12.11. Acts of Certificateholders.

124

SECTION 12.12. Successors and Assigns.

125

SECTION 12.13. Derivative Transactions.

125

EXHIBITS AND SCHEDULES :

Exhibit A

Form of Senior Certificate

A-1

Exhibit B

Form of Class A-R Certificate

B-1

Exhibit C

Form of Subordinate Certificate

C-1

Exhibit D

[Reserved]

Exhibit E

Form of Reverse of the Certificates

E-1

Exhibit F

Request for Release

F-1

Exhibit G-1

Form of Receipt of Mortgage Note

G-1-1

Exhibit G-2

Form of Interim Certificate of Trustee

G-2-1

Exhibit G-3

Form of Final Certification of Trustee

G-3-1

Exhibit H

Form of Lost Note Affidavit

H-1

Exhibit I-1

Form of ERISA Representation [Class A-R]

I-1-1

Exhibit I-2

Form of ERISA Representation [Class B-4, Class B-5, Class B-6]

I-2-1

Exhibit J-1

Form of Investment Letter [Non-Rule 144A]

J-1-1

Exhibit J-2

Form of Rule 144A Investment Letter

J-2-1

Exhibit K

Form of Transferor Certificate

K-1

Exhibit L

Transfer Affidavit for Class A-R Certificate Pursuant to Section 6.02(e)

L-1

Exhibit M

Form of Certificate of Trust

M-1

Exhibit N

List of Servicers and Servicing Agreements

N-1

Schedule I

Mortgage Loan Schedule

This Pooling and Servicing Agreement is dated as of March 1, 2005 (the “ Agreement ”), among GREENWICH CAPITAL ACCEPTANCE, INC., a Delaware corporation, as depositor (the “ Depositor ”), THORNBURG MORTGAGE HOME LOANS, INC., a Delaware corporation, as seller (the “Seller”), WELLS FARGO BANK, N.A., a national banking association, as master servicer (in such capacity, the “Master Servicer”) and as securities administrator (in such capacity, the “Securities Administrator” ), DEUTSCHE BANK TRUST COMPANY DELAWARE, a Delaware banking corporation, as Delaware trustee (the “ Delaware Trustee ”) and DEUTSCHE BANK NATIONAL TRUST COMPANY, a national banking association, as trustee (the “ Trustee ”).

PRELIMINARY STATEMENT:

On March 23, 2005 the Depositor formed Thornburg Mortgage Securities Trust 2005-1, as a Delaware statutory trust (the “ Trust ”) pursuant to the Trust Agreement, dated as of March 23, 2005 (the “ Original Trust Agreement ”), among the Depositor, the Trustee and the Delaware Trustee.

The parties to this Agreement desire to amend and restate the Original Trust Agreement in its entirety, and, as evidenced by their signatures hereto, the Original Trust Agreement is hereby amended, restated and replaced in its entirety as of the date first written above by this Agreement.

Through this Agreement, the Depositor intends to cause the issuance and sale of the Trust’s Mortgage Pass-Through Certificates, Series 2005-1 (the “ Certificates ”) representing in the aggregate the entire beneficial ownership of the Trust, the primary assets of which are the Mortgage Loans (as defined below).

On or prior to the Closing Date, the Depositor acquired the Mortgage Loans from Thornburg. On the Closing Date, the Depositor will sell the Mortgage Loans and certain other property to the Trust and receive in consideration therefor Certificates evidencing the entire beneficial ownership of the Trust.

The Depositor intends to sell the Certificates, to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twelve classes of certificates, designated as (i) the Class A-1 Certificates, (ii) the Class A-2 Certificates, (iii) the Class A-3 Certificates, (iv) the Class A-4 Certificates, (v) the Class A-5 Certificates, (vi) the Class A-R Certificate, (vii) the Class B-1 Certificates, (viii) the Class B-2 Certificates, (ix) the Class B-3 Certificates, (x) the Class B-4 Certificates, (xi) the Class B-5 Certificates and (xii) the Class B-6 Certificates.

For federal income tax purposes, the Trust Fund (exclusive of the Additional Collateral) is comprised of two REMICs in a tiered REMIC structure – the lower tier REMIC (the “ Lower Tier REMIC ”) and the upper tier REMIC (the “ Upper Tier REMIC ”). The Lower Tier REMIC will hold as its assets all of the assets constituting the Trust Fund (exclusive of the Additional Collateral) and will issue interests (the “Lower Tier Regular Interests”) (which will be uncertificated and will represent the regular interests in the Lower Tier REMIC) and a residual interest (the “Class LT-R Interest”) which will also be uncertificated and which will represent the sole class of residual interest in the Lower Tier REMIC. The Trustee will hold the Lower Tier Regular Interests as assets of the Upper Tier REMIC. The Certificates, other than the Class A-R Certificate, will represent “regular interests” in the Upper Tier REMIC, and the Class A-R Certificate, which will represent the sole class of “residual interest” in the Upper Tier REMIC as well as ownership of the Class LT-R Interest.

For purposes of the REMIC Provisions, the startup day is the Closing Date. All REMIC regular and residual interests created hereby will be retired on or before the Latest Possible Maturity Date.

Lower Tier REMIC

The following table irrevocably specifies the Class designation, interest rate, principal amount and Corresponding Classes of Certificates for each class of Lower Tier Regular Interests:

Lower Tier

Class Designation	Lower Tier Interest Rate	Initial Class Principal Amount	Corresponding Pool or Corresponding Class of Certificates
Class LT-Group 1	(1)	$ 212,700,223.71	1
Class LT-Group 1 SCA	(1)	$ 67,021.45	1
Class LT-Group 2	(2)	$ 213,997,050.80	2
Class LT-Group 2 SCA	(2)	$ 67,434.86	2
Class LT-Group 3	(3)	$ 373,133,860.10	3
Class LT-Group 3 SCA	(3)	$ 117,574.34	3
Class LT-Group 4	(4)	$ 223,982,587.71	4
Class LT-Group 4 SCA	(4)	$ 70,581.69	4
Class LT-Group 5	(5)	$ 240,893,536.73	5
Class LT-Group 5 SCA	(5)	$ 75,904.41	5
Class LT-R	(6)	(6)	LT-R

__________________

(1)

The interest rate for any Distribution Date (and the related Accrual Period) for each of these Lower-Tier Regular Interests will be a per annum rate equal to the Net WAC for Loan Group 1.

(2)

The interest rate for any Distribution Date (and the related Accrual Period) for each of these Lower-Tier Regular Interests will be a per annum rate equal to the Net WAC for Loan Group 2.

(3)

The interest rate for any Distribution Date (and the related Accrual Period) for each of these Lower-Tier Regular Interests will be a per annum rate equal to the Net WAC for Loan Group 3.

(4)

The interest rate for any Distribution Date (and the related Accrual Period) for each of these Lower-Tier Regular Interests will be a per annum rate equal to the Net WAC for Loan Group 4.

(5)

The interest rate for any Distribution Date (and the related Accrual Period) for each of these Lower-Tier Regular Interests will be a per annum rate equal to the Net WAC for Loan Group 5.

(6)

The Class LT-R Interest represents the sole class of residual interest in the Lower Tier REMIC. It does not have an interest rate or a principal balance.

On each Distribution Date, the Available Funds for Loan Group 1, Loan Group 2, Loan Group 3, Loan Group 4 or Loan Group 5, as applicable, shall be distributed as interest with respect to the Lower Tier Regular Interests based on the interest rates described above. On each Distribution Date, Net Prepayment Shortfalls shall be allocated among the several classes of Lower Tier Regular Interests based on the relative amounts of interest otherwise accrued for the related Accrual Period on each such Lower Tier Regular Interest.

On each Distribution Date, the remaining Available Funds for Loan Group 1, Loan Group 2, Loan Group 3, Loan Group 4 or Loan Group 5, as applicable, shall be distributed as principal with respect to the Lower Tier Regular Interests as follows:

(a)

First, from the remaining Available Funds for Loan Group 1, to the Class LT-Group 1 SCA Interest until its principal balance equals one percent of the Subordinate Component for Loan Group 1 after such Distribution Date;

(b)

Second, from the remaining Available Funds for Loan Group 2, to the Class LT-Group 2 SCA Interest until its principal balance equals one percent of the Subordinate Component for Loan Group 2 after such Distribution Date;

(c)

Third, from the remaining Available Funds for Loan Group 3, to the Class LT-Group 3 SCA Interest until its principal balance equals one percent of the Subordinate Component for Loan Group 3 after such Distribution Date;

(d)

Fourth, from the remaining Available Funds for Loan Group 4, to the Class LT-Group 4 SCA Interest until its principal balance equals one percent of the Subordinate Component for Loan Group 4 after such Distribution Date;

(e)

Fifth, from the remaining Available Funds for Loan Group 5, to the Class LT-Group 5 SCA Interest until its principal balance equals one percent of the Subordinate Component for Loan Group 5 after such Distribution Date;

(f)

Sixth, to Class LT-Group 1 SCA, Class LT-Group 2 SCA, Class LT-Group 3 SCA, Class LT-Group 4 SCA, and the Class LT-Group 5 SCA Lower Tier Regular Interests from the remaining Available Funds from the applicable Loan Group, the minimum amount necessary to cause the ratio of the principal balance of such Lower-Tier REMIC Interest to the principal balance of each other such Lower-Tier REMIC Interests to equal the ratio of the Subordinate Component related to such interest to the Subordinate Component related to the other such Lower-Tier REMIC Interest immediately after such Distribution Date;

(g)

Seventh, from the remaining Available Funds, to the Class LT-Group 1 Interest (and, if necessary, to the Class LT-Group 1 SCA) until the sum of its balance and that of the Class LT-Group 1 SCA, after taking into account distributions made pursuant to priorities (a) and (f) above for such Distribution Date, equals the Pool Balance for Loan Group 1 as of such Distribution Date;

(h)

Eighth, from the remaining Available Funds, to the Class LT-Group 2 Interest (and, if necessary, to the Class LT-Group 1 SCA) until the sum of its balance and that of the Class LT-Group 2 SCA, after taking into account distributions made pursuant to priorities (b) and (f) above for such Distribution Date, equals the Pool Balance for Loan Group 2 as of such Distribution Date;

(i)

Ninth, from the remaining Available Funds, to the Class LT-Group 3 Interest (and, if necessary, to the Class LT-Group 1 SCA) until the sum of its balance and that of the Class LT-Group 3 SCA, after taking into account distributions made pursuant to priorities (c) and (f) above for such Distribution Date, equals the Pool Balance for Loan Group 3 as of such Distribution Date;

(j)

Tenth, from the remaining Available Funds, to the Class LT-Group 4 Interest (and, if necessary, to the Class LT-Group 1 SCA) until the sum of its balance and that of the Class LT-Group 4 SCA, after taking into account distributions made pursuant to priorities (d) and (f) above for such Distribution Date, equals the Pool Balance for Loan Group 4 as of such Distribution Date;

(k)

Eleventh, from the remaining Available Funds, to the Class LT-Group 5 Interest (and, if necessary, to the Class LT-Group 1 SCA) until the sum of its balance and that of the Class LT-Group 5 SCA, after taking into account distributions made pursuant to priorities (e) and (f) above for such Distribution Date, equals the Pool Balance for Loan Group 5 as of such Distribution Date; and

(l)

Finally, to the Class LT-R Interest.

On each Distribution Date, Realized Losses shall be allocated among the Lower Tier Regular Interests in the same manner that principal is distributed among the Lower Tier Regular Interests.

Upper Tier REMIC

The following table sets forth (or describes) the Class designation, Pass-Through Rate and Original Class Certificate Principal Balance for each Class of Certificates comprising one or more regular interests in the REMIC created hereunder, each of which, except for the Class A-R Certificate, is hereby designated a REMIC regular interest in the Upper Tier REMIC for purposes of the REMIC Provisions:

Class	Original Class Certificate Principal Balance	Pass-Through Rate
Class A-1	$206,064,900	(1)
Class A-2	$207,321,000	(1)
Class A-3	$361,494,000	(1)
Class A-4	$216,995,000	(1)
Class A-5	$233,379,000	(1)
Class A-R	$100	(1)
Class B-1	$16,444,000	(2)
Class B-2	$8,854,000	(2)
Class B-3	$5,060,000	(2)
Class B-4	$3,794,000	(2)
Class B-5	$3,161,000	(2)
Class B-6	$2,538,775	(2)

____________

(1)

Calculated pursuant to the definition of “Pass-Through Rate.”

(2)

Calculated pursuant to the definition of “Subordinate Certificate Pass-Through Rate” (for purposes of the REMIC Provisions, the weighted average of the rates on the Class LT-Group 1 SCA, Class LT-Group 2 SCA, Class LT-Group 3 SCA, Class LT-Group 4 SCA and Class LT-Group 5 SCA Lower Tier Regular Interests, weighted in each case based on the relative principal balances of those Lower Tier Regular Interests, and determined by first subjecting the rate payable on each such Lower Tier Regular Interest to a cap and a floor equal to the Net WAC of the related Loan Group).

ARTICLE I

DEFINITIONS; DECLARATION OF TRUST

SECTION 1.01. Defined Terms .

Whenever used in this Agreement or in the Preliminary Statement, the following words and phrases, unless the context otherwise requires, shall have the meanings specified in this Article. All calculations of interest described herein shall be made on the basis of an assumed 360-day year consisting of twelve 30-day months unless otherwise indicated in this Agreement.

“1933 Act”: The Securities Act of 1933, as amended.

“Accepted Master Servicing Practices” : With respect to any Mortgage Loan, as applicable, either (x) those customary mortgage servicing practices of prudent mortgage servicing institutions that master service mortgage loans of the same type and quality as such Mortgage Loan in the jurisdiction where the related Mortgaged Property is located, to the extent applicable to the Trustee or the Master Servicer (except in its capacity as successor to a Servicer), or (y) as provided in the applicable Servicing Agreement, to the extent applicable to any Servicer, but in no event below the standard set forth in clause (x).

“Account” : The Collection Account, the Distribution Account or each Servicing Account as the context requires.

“Accrual Period” : With respect to each Distribution Date and any Class of Certificates and any Class of Lower Tier Regular Interests, the calendar month prior to the month of that Distribution Date.

“Accrued Interest Amount” : For any Distribution Date and for any Undercollateralized Group, an amount equal to one month’s interest on the applicable Principal Deficiency Amount at the Net WAC of the applicable Loan Group, plus any interest accrued on such Undercollateralized Group remaining unpaid from prior Distribution Dates.

“Additional Collateral” : With respect to any Additional Collateral Mortgage Loan, the marketable securities or other assets subject to a security interest pursuant to the related pledge agreement.

“Additional Collateral Mortgage Loan” : Each Mortgage Loan identified as such in the Mortgage Loan Schedule and as to which Additional Collateral is then required to be provided as security therefor.

“Adjusted Net Loan Rate” : With respect to any Mortgage Loan (or related REO Property), as of any date of determination, a per annum rate of interest equal to the Net Loan Rate minus the Trustee Fee Rate.

“Adjustment Date” : With respect to each Mortgage Loan, each adjustment date on which the related Loan Rate changes pursuant to the related Mortgage Note. The first Adjustment Date following the Cut-Off Date as to each Mortgage Loan is set forth in the Mortgage Loan Schedule.

“Advance” : As to any Mortgage Loan or REO Property, any advance made by the Master Servicer in respect of any Distribution Date pursuant to Section 5.05.

“Adverse REMIC Event” : Either (i) the 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) the 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 Person, any other Person controlling, controlled by or under common control with such Person. For purposes of this definition, “control” means the power to direct the management and policies of a Person, directly or indirectly, whether through ownership of voting securities, by contract or otherwise and “controlling” and “controlled” shall have meanings correlative to the foregoing.

“Aggregate Subordinate Percentage” : As to any Distribution Date, the percentage equivalent of a fraction the numerator of which is the aggregate of the Class Certificate Principal Balances of the Classes of Subordinate Certificates and the denominator of which is the Pool Balance for such Distribution Date.

“Agreement” : This Pooling and Servicing Agreement, dated as of March 1, 2005, as amended, supplemented and otherwise modified from time to time.

“Applicable Credit Support Percentage” : As defined in Section 5.01(e).

“Apportioned Principal Balance” : As to any Class of Subordinate Certificates, a Loan Group and any Distribution Date, the Class Certificate Principal Balance of such Class immediately prior to such Distribution Date multiplied by a fraction, the numerator of which is the Subordinate Component for the related Loan Group for such date and the denominator of which is the sum of the Subordinate Components (in the aggregate).

“Assignment”: As to any Mortgage, an assignment of mortgage, notice of transfer or equivalent instrument, in recordable form, which is sufficient, under the laws of the jurisdiction in which the related Mortgaged Property is located, to reflect or record the sale of such Mortgage.

“Available Funds” : As to any Distribution Date and any Loan Group, an amount equal to (i) the sum of (a) the aggregate of the related Monthly Payments received on or prior to the related Determination Date (excluding Monthly Payments due in future Due Periods but received by the related Determination Date) in respect of the Mortgage Loans in that Loan Group, (b) Net Liquidation Proceeds, Insurance Proceeds, Principal Prepayments (but not including Prepayment Penalty Amounts), Recoveries and other unscheduled recoveries of principal and interest in respect of the Mortgage Loans in that Loan Group received during the related Prepayment Period, (c) the aggregate of any amounts received in respect of related REO Properties for such Distribution Date, (d) the aggregate of any amounts of Interest Shortfalls (excluding for such purpose all shortfalls as a result of Relief Act Reductions) paid by the Servicers pursuant to the related Servicing Agreements and Compensating Interest Payments deposited in the Collection Account for such Distribution Date in respect of the Mortgage Loans in that Loan Group, (e) the aggregate of the Purchase Prices, Substitution Adjustments and amounts collected for purchases pursuant to Sections 2.03 or 3.21 deposited in the Collection Account during the related Prepayment Period in respect of the Mortgage Loans in that Loan Group, (f) the aggregate of any Advances made by the Servicers and the Master Servicer for such Distribution Date in respect of the Mortgage Loans in that Loan Group, (g) the aggregate of any Advances made by the Trustee for such Distribution Date pursuant to Section 7.02 hereof in respect of the Mortgage Loans in that Loan Group and (h) the Termination Price allocated to such Loan Group on the Distribution Date on which the Trust is terminated; minus (ii) the sum of (w) the Expense Fees for such Distribution Date in respect of the Mortgage Loans in that Loan Group, (x) amounts in reimbursement for Advances previously made in respect of the Mortgage Loans in that Loan Group and other amounts as to which the Servicers, the Trustee, the Securities Administrator and the Master Servicer are entitled to be reimbursed pursuant to Section 4.03, (y) the amount payable to the Trustee, the Delaware Trustee, the Master Servicer, the Custodian or the Securities Administrator pursuant to Section 8.05 and Section 3.27(c) in respect of Mortgage Loans in that Loan Group or if not related to a Mortgage Loan, allocated to each Loan Group on a pro rata basis and (z) amounts deposited in the Collection Account or the Distribution Account, as the case may be, in error, in respect of Mortgage Loans in that Loan Group, in each case without duplication.

“Bankruptcy Code” : The Bankruptcy Reform Act of 1978 (Title 11 of the United States Code), as amended.

“Base Value” : With respect to any Mortgage Loan for which Additional Collateral has been pledged, the value of the Additional Collateral as determined with respect to that Mortgage Loan in accordance with the applicable underwriting guidelines.

“Book-Entry Certificates” : Any of the Certificates that shall be registered in the name of the Depository or its nominee, the ownership of which is reflected on the books of the Depository or on the books of a Person maintaining an account with the Depository (directly, as a “Depository Participant”, or indirectly, as an indirect participant in accordance with the rules of the Depository and as described in Section 6.02 hereof). On the Closing Date, all Classes of the Certificates other than the Physical Certificates shall be Book-Entry Certificates.

“Business Day” : Any day other than a Saturday, a Sunday or a day on which banking or savings institutions in the State of California, the State of Maryland, the State of Minnesota, the State of New York or in the city in which the Corporate Trust Office of the Trustee is located are authorized or obligated by law or executive order to be closed.

“Certificate” : Any Regular Certificate or Residual Certificate.

“Certificate Notional Balance” : Not applicable.

“Certificate of Trust” : The certificate of trust filed with the Delaware Secretary of State in respect of the Trust pursuant to Section 3810 of the DSTS.

“Certificate Owner” : With respect to each Book-Entry Certificate, any beneficial owner thereof and with respect to each Physical Certificate, the Certificateholder thereof.

“Certificate Principal Balance” : With respect to each Certificate of a given Class and any date of determination, the product of (i) the Class Certificate Principal Balance of such Class and (ii) the applicable Percentage Interest of such Certificate.

“Certificate Register” and “Certificate Registrar” : The register maintained and registrar appointed pursuant to Section 6.02 hereof.

“Certificateholder” or “Holder” : The Person in whose name a Certificate is registered in the Certificate Register, except that a Disqualified Organization or non-U.S. Person shall not be a Holder of a Residual Certificate for any purpose hereof.

“Class” : Collectively, Certificates that have the same priority of payment and bear the same class designation and the form of which is identical except for variation in the Percentage Interest evidenced thereby.

“Class A-1 Certificate” : Any of the Class A-1 Certificates as designated on the face thereof, executed by the Trustee and authenticated and delivered by the Certificate Registrar, substantially in the form annexed hereto as Exhibit A, evidencing the ownership of a “regular interest” in the Upper Tier REMIC created hereunder and representing the right to distributions as set forth herein and therein.

“Class A-2 Certificate”: Any of the Class A-2 Certificates as designated on the face thereof, executed by the Trustee and authenticated and delivered by the Certificate Registrar, substantially in the form annexed hereto as Exhibit A, evidencing the ownership of a “regular interest” in the Upper Tier REMIC created hereunder and representing the right to distributions as set forth herein and therein.

“Class A-3 Certificate” : Any of the Class A-3 Certificates as designated on the face thereof, executed by the Trustee and authenticated and delivered by the Certificate Registrar, substantially in the form annexed hereto as Exhibit A, evidencing the ownership of a “regular interest” in the Upper Tier REMIC created hereunder and representing the right to distributions as set forth herein and therein.

“Class A-4 Certificate” : Any of the Class A-4 Certificates as designated on the face thereof, executed by the Trustee and authenticated and delivered by the Certificate Registrar, substantially in the form annexed hereto as Exhibit A, evidencing the ownership of a “regular interest” in the Upper Tier REMIC created hereunder and representing the right to distributions as set forth herein and therein.

“Class A-5 Certificate” : Any of the Class A-5 Certificates as designated on the face thereof, executed by the Trustee and authenticated and delivered by the Certificate Registrar, substantially in the form annexed hereto as Exhibit A, evidencing the ownership of a “regular interest” in the Upper Tier REMIC created hereunder and representing the right to distributions as set forth herein and therein.

“Class A-R Certificate” : The Class A-R Certificate as designated on the face thereof, executed by the Trustee, and authenticated and delivered by the Certificate Registrar, substantially in the form annexed hereto as Exhibit B, evidencing the ownership of the sole class of “residual interests” in the Upper Tier REMIC created hereunder as well as ownership of the Class LT-R Interest and representing the right to distributions as set forth herein and therein.

“Class B-1 Certificate”: Any of the Class B-1 Certificates as designated on the face thereof, executed by the Trustee and authenticated and delivered by the Certificate Registrar, substantially in the form annexed hereto as Exhibit C, evidencing the ownership of a “regular interest” in the Upper Tier REMIC created hereunder and representing the right to distributions as set forth herein and therein.

“Class B-2 Certificate” : Any of the Class B-2 Certificates as designated on the face thereof, executed by the Trustee and authenticated and delivered by the Certificate Registrar, substantially in the form annexed hereto as Exhibit C, evidencing the ownership of a “regular interest” in the Upper Tier REMIC created hereunder and representing the right to distributions as set forth herein and therein.

“Class B-3 Certificate”: Any of the Class B-3 Certificates as designated on the face thereof, executed by the Trustee and authenticated and delivered by the Certificate Registrar, substantially in the form annexed hereto as Exhibit C, evidencing the ownership of a “regular interest” in the Upper Tier REMIC created hereunder and representing the right to distributions as set forth herein and therein.

“Class B-4 Certificate”: Any of the Class B-4 Certificates as designated on the face thereof, executed by the Trustee and authenticated and delivered by the Certificate Registrar, substantially in the form annexed hereto as Exhibit C, evidencing the ownership of a “regular interest” in the Upper Tier REMIC created hereunder and representing the right to distributions as set forth herein and therein.

“Class B-5 Certificate” : Any of the Class B-5 Certificates as designated on the face thereof, executed by the Trustee and authenticated and delivered by the Certificate Registrar, substantially in the form annexed hereto as Exhibit C, evidencing the ownership of a “regular interest” in the Upper Tier REMIC created hereunder and representing the right to distributions as set forth herein and therein.

“Class B-6 Certificate” : Any of the Class B-6 Certificates as designated on the face thereof, executed by the Trustee and authenticated and delivered by the Certificate Registrar, substantially in the form annexed hereto as Exhibit C, evidencing the ownership of a “regular interest” in the Upper Tier REMIC created hereunder and representing the right to distributions as set forth herein and therein.

“Class Certificate Notional Balance” : Not applicable.

“Class Certificate Principal Balance” : As to any Distribution Date, with respect to any Class of Certificates, the Original Class Certificate Principal Balance as reduced by the sum of (x) all amounts actually distributed in respect of principal of that Class on all prior Distribution Dates, (y) all Realized Losses, if any, actually allocated to that Class on all prior Distribution Dates and (z) in the case of the Subordinate Certificates, any applicable Writedown Amount; provided, however , that pursuant to Section 5.08, the Class Certificate Principal Balance of a Class of Certificates may be increased up to the amount of Realized Losses previously allocated to such Class, in the event that there is a Recovery on a Mortgage Loan, and the Certificate Principal Balance of any individual Certificate of such Class will be increased by its pro rata share of the increase to such Class.

“Class LT-R Interest” : As described in the Preliminary Statement.

“Class Subordination Percentage”: With respect to each Class of Subordinate Certificates and any Distribution Date, the percentage equivalent of a fraction the numerator of which is the Class Certificate Principal Balance of such Class immediately before such Distribution Date and the denominator of which is the aggregate of the Class Certificate Principal Balances of all Classes of Certificates immediately before such Distribution Date.

“Close of Business” : As used herein, with respect to any Business Day and location, 5:00 p.m. at such location.

“Closing Date” : March 29, 2005.

“Code”: The Internal Revenue Code of 1986, as amended.

“Collection Account” : The account or accounts created and maintained by the Master Servicer pursuant to Section 4.02, which shall be entitled “Wells Fargo Bank, N.A., as Master Servicer for Deutsche Bank National Trust Company, as Trustee, in trust for the registered Holders of Thornburg Mortgage Securities Trust 2005-1, Mortgage Pass-Through Certificates, Series 2005-1” and which must be an Eligible Account.

“Commission” : U.S. Securities and Exchange Commission.

“Compensating Interest Payment” : With respect to any Distribution Date, an amount equal to the amount, if any, by which (x) the aggregate amount of any Interest Shortfalls (excluding for such purpose all shortfalls as a result of Relief Act Reductions) required to be paid by the Servicers pursuant to the related Servicing Agreement with respect to such Distribution Date, exceeds (y) the aggregate amount actually paid by the Servicers in respect of such shortfalls; provided, that such amount, to the extent payable by the Master Servicer, shall not exceed the aggregate Master Servicing Fee that would be payable to the Master Servicer in respect of such Distribution Date without giving effect to any Compensating Interest Payment.

“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 Loan Documents” : As to any Cooperative Loan, (i) the Cooperative Shares, together with a stock power in blank; (ii) the original or a copy of the executed Security Agreement and the assignment of the Security Agreement in blank; (iii) the original or a copy of the executed Proprietary Lease and the original assignment of the Proprietary Lease endorsed in blank; (iv) the original executed Recognition Agreement and, if available, the original assignment of the Recognition Agreement (or a blanket assignment of all Recognition Agreements) endorsed in blank; (v) the executed UCC-1 financing statement with evidence of recording thereon, which has been filed in all places required to perfect the security interest in the Cooperative Shares and the Proprietary Lease; and (vi) executed UCC Amendments (or copies thereof) or other appropriate UCC financing statements required by state law, evidencing a complete and unbroken line from the mortgagee to the Trustee with evidence of recording thereon (or in a form suitable for recordation).

“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 Cooperative Shares of the Cooperative Corporation.

“Cooperative Shares” : Shares issued by a Cooperative Corporation.

“Cooperative Unit” : A single family dwelling located in a Cooperative Property.

“Corporate Trust Office” : The principal corporate trust office of the Trustee at which at any particular time its corporate trust business in connection with this Agreement shall be administered, which office at the date of the execution of this instrument is located at 1761 East St. Andrew Place, Santa Ana, CA 92705, Attention: Thornburg 2005-1 TM0501, or at such other address as the Trustee may designate from time to time by notice to the Certificateholders, the Depositor and the Seller.

“Correspondent Sellers Guide” : The Seller’s Correspondent Sellers Guide, revised February 1, 2005 and as revised from time to time.

“Corresponding Class” : With respect to each class of Lower Tier Regular Interests, the Class or Classes of Certificates corresponding to such class of Lower Tier Regular Interests as set forth in the Preliminary Statement.

“Custodian” : Deutsche Bank National Trust Company, and its successors acting as custodian of the Mortgage Files.

“Cut-Off Date”: With respect to any Mortgage Loan other than a Qualified Substitute Mortgage Loan, the Close of Business in New York City on March 1, 2005. With respect to any Qualified Substitute Mortgage Loan, the date designated as such on the Mortgage Loan Schedule (as amended).

“Cut-Off Date Aggregate Principal Balance”: The aggregate of the Cut-Off Date Principal Balances of the Mortgage Loans in each Loan Group.

“Cut-Off Date Principal Balance” : With respect to any Mortgage Loan, the principal balance thereof remaining to be paid, after application of all scheduled principal payments due on or before the Cut-Off Date whether or not received as of the Cut-Off Date (or as of the applicable date of substitution with respect to a Qualified Substitute Mortgage Loan).

“Debt Service Reduction” : With respect to any Mortgage Loan, a reduction in the scheduled Monthly Payment for that Mortgage Loan by a court of competent jurisdiction in a proceeding under the Bankruptcy Code.

“Definitive Certificates” : Any Certificate evidenced by a Physical Certificate and any Certificate issued in lieu of a Book-Entry Certificate pursuant to Section 6.02(c) or (d) hereof.

“Delaware Statutory Trust Statute” or “DSTS” : As defined in Section 1A.03.

“Delaware Trustee” : Deutsche Bank Trust Company Delaware, not in its individual capacity but solely as trustee, and its successors and assigns.

“Deleted Mortgage Loan”: A Mortgage Loan replaced or to be replaced by one or more Qualified Substitute Mortgage Loans.

“Delinquent” : Any Mortgage Loan with respect to which the Monthly Payment due on a Due Date is not made.

“Depositor” : Greenwich Capital Acceptance, Inc., a Delaware corporation, or any successor in interest.

“Depository” : The initial Depository shall be The Depository Trust Company, whose nominee is Cede & Co., or any other organization registered as a “clearing agency” pursuant to Section 17A of the Exchange Act. The Depository shall initially be the registered Holder of the Book-Entry Certificates. The Depository shall at all times be a “clearing corporation” as defined in Section 8-102(3) of the Uniform Commercial Code of the State of New York.

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

“Determination Date” : For any Distribution Date and each Mortgage Loan, the date each month, as set forth in the related Servicing Agreement, on which the related Servicer determines the amount of all funds required to be remitted to the Master Servicer on the Servicer Remittance Date with respect to the Mortgage Loans it is servicing.

“Disqualified Organization”: A “disqualified organization” defined in Section 860E(e)(5) of the Code, or any other Person so designated by the Trustee based upon an Opinion of Counsel provided to the Trustee by nationally recognized counsel acceptable to the Trustee that the holding of an ownership interest in the Residual Certificate by such Person may cause the Trust Fund or any Person having an ownership interest in any Class of Certificates (other than such Person) to incur liability for any federal tax imposed under the Code that would not otherwise be imposed but for the transfer of an ownership interest in the Residual Certificate to such Person.

“Distribution Account” : The trust account or accounts created and maintained by the Trustee pursuant to Section 4.04 hereof which shall be entitled “Distribution Account, Deutsche Bank National Trust Company, as Trustee, in trust for the registered Certificateholders of Thornburg Mortgage Securities Trust 2005-1, Mortgage Loan Pass-Through Certificates, Series 2005-1” and which must be an Eligible Account.

“Distribution Account Income” : As to any Distribution Date, any interest or other investment income earned on funds deposited in the Distribution Account during the month of such Distribution Date.

“Distribution Date”: The 25th day of the month, or, if such day is not a Business Day, the next Business Day commencing in April 2005.

“Distribution Date Statement”: As defined in Section 5.04(a) hereof.

“Due Date”: With respect to each Mortgage Loan and any Distribution Date, the first day of the calendar month in which such Distribution Date occurs on which the Monthly Payment for such Mortgage Loan was due, exclusive of any days of grace.

“Due Period” : With respect to any Distribution Date, the period commencing on the second day of the month preceding the month in which such Distribution Date occurs and ending on the first day of the month in which such Distribution Date occurs.

“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 short-term unsecured debt obligations of such holding company) are rated in the highest short term rating category of the Rating Agency at the time any amounts are held on deposit therein;

(ii)

an account or accounts the deposits in which are fully insured by the FDIC (to the limits established by it), the uninsured deposits in which account are otherwise secured such that, as evidenced by an Opinion of Counsel delivered to the Trustee and to the Rating Agency, the Certificateholders will have a claim with respect to the funds in the account or a perfected first priority security interest against the collateral (which shall be limited to Permitted Investments) securing those funds that is superior to claims of any other depositors or creditors of the depository institution with which such account is maintained;

(iii)

a trust account or accounts maintained with the trust department of a federal or state chartered depository institution, national banking association or trust company acting in its fiduciary capacity; or

(iv)

an account otherwise acceptable to the Rating Agency without reduction or withdrawal of its then current ratings of the Certificates as evidenced by a letter from the Rating Agency to the Trustee. Eligible Accounts may bear interest.

“Employee Loan” : Any Mortgage Loan identified as such in the Mortgage Loan Schedule and which was originated by the Seller, which provides for an increase in the Loan Rate thereof in the event of the change of employment of the Mortgagor thereunder.

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

“ERISA-Restricted Certificates” : Any of the Class B-4, Class B-5, Class B-6, the Residual Certificate and any Certificate that does not satisfy the applicable rating requirement under the Underwriter’s Exemption.

“Escrow Payments” : The amounts constituting ground rents, taxes, assessments, water rates, fire and hazard insurance premiums and other payments required to be escrowed by the Mortgagor with the mortgagee pursuant to any Mortgage Loan.

“Event of Default” : In respect of the Master Servicer, one or more of the events (howsoever described) set forth in Section 7.01 hereof as an event or events upon the occurrence and continuation of which the Master Servicer may be terminated.

“Exchange Act” : The Securities Exchange Act of 1934, as amended.

“Expense Fee” With respect to any Mortgage Loan, the sum of (w) the Retained Interest, if any, (x) the Master Servicing Fee, (y) the related Servicing Fee with respect to the related Servicer and (z) the Trustee Fee for such Mortgage Loan.

“Expense Fee Rate” : With respect to any Mortgage Loan, the per annum rate at which the Expense Fee accrues for such Mortgage Loan as set forth in the Mortgage Loan Schedule.

“Fannie Mae” : The Federal National Mortgage Association or any successor thereto.

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

“Final Recovery Determination” : With respect to any defaulted Mortgage Loan or any REO Property (other than a Mortgage Loan or REO Property purchased by the Seller pursuant to or contemplated by Section 2.03, 3.21 and 10.01), a determination made by the related Servicer that all Insurance Proceeds, Liquidation Proceeds and other payments or recoveries which it expects to be finally recoverable in respect thereof have been so recovered.

“Freddie Mac” : The Federal Home Loan Mortgage Corporation or any successor thereto.

“Gross Margin”: With respect to each Mortgage Loan, the fixed percentage set forth in the related Mortgage Note that is added to the applicable Index on each Adjustment Date in accordance with the terms of the related Mortgage Note used to determine the Loan Rate for such Mortgage Loan.

“Group 1 Mortgage Loan” : A Mortgage Loan that is identified as such on the Mortgage Loan Schedule.

“Group 2 Mortgage Loan” : A Mortgage Loan that is identified as such on the Mortgage Loan Schedule.

“Group 3 Mortgage Loan”: A Mortgage Loan that is identified as such on the Mortgage Loan Schedule.

“Group 4 Mortgage Loan” : A Mortgage Loan that is identified as such on the Mortgage Loan Schedule.

“Group 5 Mortgage Loan” : A Mortgage Loan that is identified as such on the Mortgage Loan Schedule.

“Indemnified Persons” : The Trustee (in all capacities hereunder), the Delaware Trustee, the Master Servicer, the Depositor and the Securities Administrator and their officers, directors, agents and employees and, with respect to the Trustee, any separate co-trustee and its officers, directors, agents and employees.

“Independent”: When used with respect to any specified Person, any such Person who (a) is in fact independent of the Depositor and its Affiliates, (b) does not have any direct financial interest in or any material indirect financial interest in the Depositor or any Affiliate thereof, and (c) is not connected with the Depositor or any Affiliate thereof as an officer, employee, promoter, underwriter, trustee, partner, director or Person performing similar functions; provided, however , that a Person shall not fail to be Independent of the Depositor or any Affiliate thereof merely because such Person is the beneficial owner of 1% or less of any class of securities issued by the Depositor or any Affiliate thereof.

“Index” : With respect to each Mortgage Loan and each Adjustment Date, the index specified in the related Mortgage Note.

“Initial Certificate Principal Balance” : With respect to any Certificate, the amount designated “Initial Certificate Principal Balance” on the face thereof.

“Initial Certificate Notional Balance” : Not applicable.

“Initial Loan Group 1 Balance” : $212,767,245.16.

“Initial Loan Group 2 Balance” : $214,064,485.66.

“Initial Loan Group 3 Balance”: $373,251,434.44.

“Initial Loan Group 4 Balance” : $244,053,169.40.

“Initial Loan Group 5 Balance” : $240,969,441.14.

“Insurance Proceeds” : With respect to any Mortgage Loan, proceeds of any title policy, hazard policy or other insurance policy covering a Mortgage Loan, to the extent such proceeds are not to be applied to the restoration of the related Mortgaged Property or released to the related Mortgagor in accordance with the related Servicing Agreement.

“Interest Distributable Amount” : With respect to any Distribution Date and each Class of Certificates, the sum of (i) the Monthly Interest Distributable Amount for that Class and (ii) the Unpaid Interest Shortfall Amount for that Class.

“Interest Shortfall” : With respect to any Distribution Date and each Mortgage Loan that during the related Prepayment Period was the subject of a Principal Prepayment or a reduction of its Monthly Payment under the Relief Act, constitutes an amount determined as follows:

(a)

Principal Prepayments in part received during the relevant Prepayment Period: the difference between (i) one month’s interest at the applicable Net Loan Rate on the amount of such prepayment and (ii) the amount of interest for the calendar month of such prepayment (adjusted to the applicable Net Loan Rate) received at the time of such prepayment; and

(b)

Principal Prepayments in full received during the relevant Prepayment Period: the difference between (i) one month’s interest at the applicable Net Loan Rate on the Stated Principal Balance of such Mortgage Loan immediately prior to such prepayment and (ii) the amount of interest for the calendar month of such prepayment (adjusted to the applicable Net Loan Rate) received at the time of such prepayment; and

(c)

any Relief Act Reductions for such Distribution Date.

“Latest Possible Maturity Date” : As determined as of the Cut-Off Date, the Distribution Date following the fifth anniversary of the scheduled maturity date of the Mortgage Loan having the latest scheduled maturity date as of the Cut-Off Date.

“Liquidated Mortgage Loan”: As to any Distribution Date, any Mortgage Loan in respect of which the related Servicer or the Master Servicer has determined, in accordance with the servicing procedures specified herein, as of the end of the related Prepayment Period, that all Liquidation Proceeds that it expects to recover with respect to the liquidation of such Mortgage Loan or disposition of the related REO Property have been recovered.

“Liquidation Event”: With respect to any Mortgage Loan, any of the following events: (i) such Mortgage Loan is paid in full; (ii) a Final Recovery Determination is made as to such Mortgage Loan; or (iii) such Mortgage Loan is removed from the Trust Fund by reason of its being purchased, sold or replaced pursuant to or as contemplated hereunder. With respect to any REO Property, either of the following events: (i) a Final Recovery Determination is made as to such REO Property; or (ii) such REO Property is removed from the Trust Fund by reason of its being sold or purchased pursuant to Section 10.01 hereof or the applicable provisions of the related Servicing Agreement.

“Liquidation Expenses”: With respect to a Mortgage Loan in liquidation, unreimbursed expenses paid or incurred by or for the account of the Master Servicer or the related Servicers, such expenses including (a) property protection expenses, (b) property sales expenses, (c) foreclosure and sale costs, including court costs and reasonable attorneys’ fees, and (d) similar expenses reasonably paid or incurred in connection with liquidation.

“Liquidation Proceeds”: With respect to any Mortgage Loan, the amount (other than amounts received in respect of the rental of any REO Property prior to REO Disposition) received by the related Servicer as proceeds from the liquidation of such Mortgage Loan, as determined in accordance with the applicable provisions of the related Servicing Agreement, other than Recoveries; provided that (i) with respect to any Mortgage Loan or REO Property repurchased, substituted or sold pursuant to or as contemplated hereunder, or pursuant to the applicable provisions of the related Servicing Agreement, “Liquidation Proceeds” shall also include amounts realized in connection with such repurchase, substitution or sale and (ii) with respect to a defaulted Additional Collateral Mortgage Loan, “Liquidation Proceeds” shall also include the amount realized on the related Additional Collateral.

“Loan Group” : Any of Loan Group 1, Loan Group 2, Loan Group 3, Loan Group 4 or Loan Group 5, as the context requires.

“Loan Group Balance” : As to each Loan Group and any Distribution Date, the aggregate of the Stated Principal Balances, as of the Close of Business on the first day of the month preceding the month in which such Distribution Date occurs, of the Mortgage Loans in such Loan Group that were Outstanding Mortgage Loans on that day.

“Loan Group 1”: At any time, the Group 1 Mortgage Loans in the aggregate and any REO Properties acquired in respect thereof.

“Loan Group 2”: At any time, the Group 2 Mortgage Loans in the aggregate and any REO Properties acquired in respect thereof.

“Loan Group 3”: At any time, the Group 3 Mortgage Loans in the aggregate and any REO Properties acquired in respect thereof.

“Loan Group 4”: At any time, the Group 4 Mortgage Loans in the aggregate and any REO Properties acquired in respect thereof.

“Loan Group 5”: At any time, the Group 5 Mortgage Loans in the aggregate and any REO Properties acquired in respect thereof.

“Loan Rate”: With respect to each Mortgage Loan, the annual rate at which interest accrues on such Mortgage Loan from time to time in accordance with the provisions of the related Mortgage Note.

“Loan-to-Collateral Value Ratio”: With respect to each Mortgage Loan and any date of determination, a fraction, expressed as a percentage, the numerator of which is the Principal Balance of the Mortgage Loan at such date of determination less the Base Value of any related Additional Collateral and the denominator of which is the Value of the related Mortgaged Property.

“Loan-to-Value Ratio” : With respect to each Mortgage Loan and any date of determination, a fraction, expressed as a percentage, the numerator of which is the Principal Balance of the Mortgage Loan at such date of determination and the denominator of which is the Value of the related Mortgaged Property.

“Lost Note Affidavit”: With respect to any Mortgage Loan as to which the original Mortgage Note has been permanently lost or destroyed and has not been replaced, an affidavit from the Seller certifying that the original Mortgage Note has been lost, misplaced or destroyed (together with a copy of the related Mortgage Note and indemnifying the Trust against any loss, cost or liability resulting from the failure to deliver the original Mortgage Note) in the form of Exhibit H hereto.

“Lower Tier Regular Interest”: As described in the Preliminary Statement.

“Lower Tier REMIC”: As described in the Preliminary Statement.

“Majority Certificateholders”: The Holders of Certificates evidencing at least 51% of the Voting Rights.

“Master Servicer”: Wells Fargo Bank, N.A., or any successor Master Servicer appointed as herein provided.

“Master Servicer Certification”: A written certification covering servicing of the Mortgage Loans by all Servicers and 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) the February 21, 2003 Statement by the Staff of the Division of Corporation Finance of the Securities and Exchange Commission Regarding Compliance by Asset-Backed Issuers with Exchange Act Rules 13a-14 and 15d-14, 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 Statement referred to in clause (ii) is modified or superceded by any subsequent statement, rule or regulation of the Securities and Exchange Commission or any statement of a division thereof, or (c) any future releases, rules and regulations are published by the Securities and Exchange 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 than the form of the required certification as of the Closing Date, the Master Servicer 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.

“Master Servicer Remittance Date”: No later than 3 P.M. New York City time one Business Day prior to each Distribution Date.

“Master Servicing Fee”: As to any Distribution Date and each related Mortgage Loan, an amount equal to the product of the applicable Master Servicing Fee Rate and the outstanding Principal Balance of such Mortgage Loan as of the first day of the related Due Period. The Master Servicing Fee for any Mortgage Loan shall be payable in respect of any Distribution Date solely from the interest portion of the Monthly Payment or other payment or recovery with respect to such Mortgage Loan.

“Master Servicing Fee Rate”: 0.015% per annum.

“Master Servicing Guide”: Wells Fargo Conduit and Norwest Conduit Servicing Guide, dated January 1997, as amended July 2001.

“Maximum Loan Rate”: With respect to each Mortgage Loan, the percentage set forth in the related Mortgage Note as the maximum Loan Rate thereunder.

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

“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.

“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.

“Monthly Interest Distributable Amount”: With respect to each Class of Certificates and any Distribution Date, the amount of interest accrued during the related Accrual Period at the related Pass-Through Rate on the Class Certificate Principal Balance or Class Certificate Notional Balance, as applicable, of that Class immediately prior to that Distribution Date.

“Monthly Payment”: With respect to any Mortgage Loan, the scheduled monthly payment of principal and/or interest on such Mortgage Loan that is payable by the related Mortgagor from time to time under the related Mortgage Note, determined, for the purposes of this Agreement: (a) after giving effect to (i) any Debt Service Reduction with respect to such Mortgage Loan and (ii) any reduction in the amount of interest collectible from the related Mortgagor pursuant to the Relief Act; (b) without giving effect to any extension granted or agreed to by the related Servicer pursuant to the applicable provisions of the related Servicing Agreement; and (c) on the assumption that all other amounts, if any, due under such Mortgage Loan are paid when due.

“Mortgage”: The mortgage, deed of trust or other instrument creating a first lien on, or first priority security interest in, a Mortgaged Property securing a Mortgage Note.

“Mortgage File”: The mortgage documents listed in Section 2.01 hereof pertaining to a particular Mortgage Loan and any additional documents required to be added to the Mortgage File pursuant to this Agreement.

“Mortgage Loan”: Each mortgage loan (including Cooperative Loans) transferred and assigned to the Trustee pursuant to Section 2.01 or Section 2.03(d) hereof as from time to time held as a part of the Trust Fund, the Mortgage Loans so held being identified in the Mortgage Loan Schedule.

“Mortgage Loan Purchase Agreement”: The Mortgage Loan Purchase Agreement between the Seller and the Depositor, dated as of March 1, 2005, regarding the transfer of the Mortgage Loans by the Seller to or at the direction of the Depositor.

“Mortgage Loan Schedule”: As of any date, the list of Mortgage Loans included in the Trust Fund on such date, attached hereto as Schedule I. The Mortgage Loan Schedule shall be prepared by the Seller and shall set forth the following information with respect to each Mortgage Loan:

(i)

the Mortgage Loan identifying number;

(ii)

the Mortgagor’s name;

(iii)

the street address of the Mortgaged Property including the state and five-digit ZIP code;

(iv)

a code indicating whether the Mortgaged Property was represented by the borrower, at the time of origination, as being owner-occupied;

(v)

a code indicating whether the Residential Dwelling constituting the Mortgaged Property is (a) a detached single family dwelling, (b) a dwelling in a planned unit development, (c) a condominium unit, (d) a two- to four-unit residential property, (e) a townhouse or (f) other type of Residential Dwelling;

(vi)

if the related Mortgage Note permits the borrower to make Monthly Payments of interest only for a specified period of time, (a) the original number of such specified Monthly Payments and (b) the remaining number of such Monthly Payments as of the Cut-Off Date;

(vii)

the original months to maturity;

(viii)

the stated remaining months to maturity from the Cut-Off Date based on the original amortization schedule;

(ix)

the Loan-to-Value Ratio at origination;

(x)

the value of any Additional Collateral at origination;

(xi)

the Loan-to-Collateral Value Ratio at origination;

(xii)

the Loan Rate in effect immediately following the Cut-Off Date;

(xiii)

the date on which the first Monthly Payment is or was due on the Mortgage Loan;

(xiv)

the stated maturity date;

(xv)

the Master Servicing Fee Rate and the Servicing Fee Rate, if any;

(xvi)

whether such loan is an Additional Collateral Mortgage Loan or an Employee Loan;

(xvii)

the last Due Date on which a Monthly Payment was actually applied

to the unpaid Stated Principal Balance;

(xviii) the original principal balance of the Mortgage Loan;

(xix) the Stated Principal Balance of the Mortgage Loan on the Cut-Off

Date and a code indicating the purpose of the Mortgage Loan (i.e.,

purchase financing, rate/term refinancing, cash-out refinancing);

(xx)

the Index and Gross Margin specified in related Mortgage Note;

(xxi)

the next Adjustment Date, if applicable;

(xxii)

the Maximum Loan Rate, if applicable;

(xxiii) the Value of the Mortgaged Property;

(xxiv) the sale price of the Mortgaged Property, if applicable;

(xxv) the product code;

(xxvi) Expense Fee Rate therefor;

(xxvii) the Servicer, if any, that is servicing each Mortgage Loan and the

originator of the Mortgage Loan; and

(xxviii)

the respective Loan Group.

Information set forth in clauses (ii) and (iii) above regarding each Mortgagor and the related Mortgaged Property shall be confidential and the Trustee (or Master Servicer) shall not disclose such information except to the extent disclosure may be required by any law or regulatory or administrative authority; provided, however , that the Trustee may disclose on a confidential basis any such information to its agents, attorneys and any auditors in connection with the performance of its responsibilities hereunder.

The Mortgage Loan Schedule, as in effect from time to time, shall also set forth the following information with respect to the Mortgage Loans in the aggregate and by Loan Group as of the Cut-Off Date: (1) the number of Mortgage Loans; (2) the current Principal Balance of the Mortgage Loans; (3) the weighted average Loan Rate of the Mortgage Loans; and (4) the weighted average remaining months to maturity of the Mortgage Loans. The Mortgage Loan Schedule shall be amended from time to time by the Seller in accordance with the provisions of this Agreement.

“Mortgage Note”: The original executed note or other evidence of indebtedness evidencing the indebtedness of a Mortgagor under a Mortgage Loan.

“Mortgaged Property”: Either of (x) the fee simple or leasehold interest in real property, together with improvements thereto including any exterior improvements to be completed within 120 days of disbursement of the related Mortgage Loan proceeds, or (y) in the case of a Cooperative Loan, the related Cooperative Shares and Proprietary Lease, securing the indebtedness of the Mortgagor under the related Mortgage Loan.

“Mortgagor”: The obligor on a Mortgage Note.

“Net Interest Shortfall”: With respect to any Distribution Date, the excess of the Interest Shortfall, if any, for such Distribution Date over the sum of (i) Interest Shortfalls paid by the Servicers under the related Servicing Agreements with respect to such Distribution Date and (ii) Compensating Interest Payments made with respect to such Distribution Date.

“Net Liquidation Proceeds”: With respect to any Liquidated Mortgage Loan or any other disposition of related Mortgaged Property (including REO Property) the related Liquidation Proceeds net of Advances, related Servicing Advances, Master Servicing Fee, related 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, and any related Retained Interest.

“Net Loan Rate”: With respect to any Mortgage Loan (or the related REO Property), as of any date of determination, a per annum rate of interest equal to the then applicable Loan Rate for such Mortgage Loan minus the related Servicing Fee Rate, Master Servicing Fee Rate and Retained Rate, if any.

“Net WAC”: With respect to each Loan Group and any Distribution Date, the weighted average of the Adjusted Net Loan Rates of the Mortgage Loans in that Loan Group as of the first day of the month preceding the month in which such Distribution Date occurs (or, in the case of the first Distribution Date, as of the Cut-Off Date), weighted on the basis of the related Stated Principal Balances.

“Nonrecoverable”: The determination by the Master Servicer or the related Servicer in respect of a delinquent Mortgage Loan that if it were to make an Advance in respect of thereof, such amount would not be recoverable from any collections or other recoveries (including Liquidation Proceeds) on such Mortgage Loan.

“Officers’ Certificate”: A certificate signed by the Chairman of the Board, the Vice Chairman of the Board, the President or a vice president (however denominated), or by the Treasurer, the Secretary, or one of the assistant treasurers or assistant secretaries of the Seller, the Master Servicer or the Depositor, as applicable.

“One-Month LIBOR”: The average of interbank offered rates for one month U.S. dollar deposits in the London market based on quotations of major banks.

“One-Month LIBOR Indexed”: Indicates a Mortgage Loan that has an adjustable Loan Rate calculated on the basis of the One-Month LIBOR index.

“One-Year CMT”: The weekly average yield on United States Treasury securities adjusted to a constant maturity of one year as published by the Federal Reserve Board in Statistical Release H.15(519).

“One-Year CMT Indexed”: Indicates a Mortgage Loan that has an adjustable Loan Rate calculated on the basis of the One-Year CMT Index.

“One-Year LIBOR”: The average of interbank offered rates for one-year U.S. dollar deposits in the London market based on quotations of major banks.

“One-Year LIBOR Indexed” : Indicates a Mortgage Loan that has an adjustable Loan Rate calculated on the basis of the One-Year LIBOR index.

“Opinion of Counsel”: A written opinion of counsel, who may, without limitation, be a salaried counsel for the Depositor or the Seller, acceptable to the Trustee, except that any opinion of counsel relating to (a) the qualification of any REMIC created hereunder as a REMIC or (b) compliance with the REMIC Provisions must be an opinion of Independent counsel.

“Original Applicable Credit Support Percentage”: With respect to each Class of Subordinate Certificates, the corresponding percentage set forth below opposite its Class designation:

Class B-1	3.15%
Class B-2	1.85%
Class B-3	1.15%
Class B-4	0.75%
Class B-5	0.45%
Class B-6	0.20%

“Original Class Certificate Notional Balance” : Not applicable.

“Original Class Certificate Principal Balance”: With respect to each Class of Certificates, the corresponding aggregate amount set forth opposite the Class designation of such Class in the Preliminary Statement.

“Original Subordinated Principal Balance”: The aggregate of the Original Class Certificate Principal Balances of the Classes of Subordinate Certificates.

“Original Trust Agreement”: The Trust Agreement, dated as of March 23, 2005, among the Depositor, the Trustee and the Delaware Trustee.

“OTS”: The Office of Thrift Supervision.

“Outstanding Mortgage Loan”: As of any Due Date, a Mortgage Loan with a Stated Principal Balance greater than zero, that was not the subject of a prepayment in full prior to such Due Date and that did not become a Liquidated Mortgage Loan prior to such Due Date.

“Ownership Interest”: As to any Certificate, any ownership or security interest in such Certificate, including any interest in such Certificate as the Holder thereof and any other interest therein, whether direct or indirect, legal or beneficial, as owner or as pledgee.

“Pass-Through Rate”: With respect to each Class of Certificates and any Distribution Date, the rate set forth below:

(i)

The Pass-Through Rate for the Class A-1 Certificates will be equal to the Net WAC for Loan Group 1.

(ii)

The Pass-Through Rate for the Class A-2 Certificates will be equal to the Net WAC for Loan Group 2.

(iii)

The Pass-Through Rate for the Class A-3 Certificates will be equal to the Net WAC for Loan Group 3.

(iv)

The Pass-Through Rate for the Class A-4 Certificates will be equal to the Net WAC for Loan Group 4.

(v)

The Pass-Through Rate for the Class A-5 Certificates will be equal to the Net WAC for Loan Group 5.

(vi)

The Pass-Through Rate for the Class A-R Certificates will be equal to the Net WAC for Loan Group 1.

(vii)

The Pass-Through Rate for the Class B-1, Class B-2, Class B-3, Class B-4, Class B-5 and Class B-6 Certificates will be equal to the Subordinate Certificate Pass-Through Rate.

“Paying Agent”: Any paying agent appointed pursuant to Section 6.05 hereof.

“Percentage Interest”: With respect to any Certificate other than a Residual Certificate, a fraction, expressed as a percentage, the numerator of which is the Initial Certificate Principal Balance or Initial Certificate Notional Balance, as applicable, represented by such Certificate and the denominator of which is the Original Class Certificate Principal Balance or Original Class Certificate Notional Balance, as applicable, of the related Class. With respect to each Class of Residual Certificate, 100%.

“Permitted Investments”: Any one or more of the following obligations or securities acquired at a purchase price of not greater than par, regardless of whether issued or managed by the Depositor, the Master Servicer, the Trustee or any of their respective Affiliates or for which an Affiliate of the Trustee serves as an advisor:

(i)

direct obligations of, or obligations fully guaranteed as to timely payment of principal and interest by, the United States or any agency or instrumentality thereof, provided such obligations are backed by the full faith and credit of the United States;

(ii)

(A) demand and time deposits in, certificates of deposit of, bankers’ acceptances issued by or federal funds sold by any depository institution or trust company (including the Trustee or the Master Servicer or their agents acting in their respective commercial capacities) incorporated under the laws of the United States of America or any state thereof and subject to supervision and examination by federal and/or state authorities, so long as, at the time of such investment or contractual commitment providing for such investment, such depository institution or trust company or its ultimate parent has a short-term uninsured debt rating in one of the two highest available rating categories of the Rating Agency and (B) any other demand or time deposit or deposit which is fully insured by the FDIC;

(iii)

repurchase obligations with respect to any security described in clause (i) above and entered into with a depository institution or trust company (acting as principal) rated A or higher by the Rating Agency;

(iv)

securities bearing interest or sold at a discount that are issued by any corporation incorporated under the laws of the United States of America, the District of Columbia or any State thereof and that are rated by the Rating Agency in its highest long-term unsecured rating categories at the time of such investment or contractual commitment providing for such investment;

(v)

commercial paper (including both non-interest-bearing discount obligations and interest-bearing obligations) that is rated by the Rating Agency in its highest short-term unsecured debt rating available at the time of such investment;

(vi)

units of money market funds (which may be 12b-1 funds, as contemplated by the Commission under the Investment Company Act of 1940) registered under the Investment Company Act of 1940 including funds managed or advised by the Trustee, the Master Servicer or an affiliate thereof having the highest applicable rating from the Rating Agency; and

(vii)

if previously confirmed in writing to the Trustee, any other demand, money market or time deposit, or any other obligation, security or investment, as may be acceptable to the Rating Agency in writing as a permitted investment of funds backing securities having ratings equivalent to its highest initial rating of the Senior Certificates;

provided, however , that no instrument described hereunder shall evidence either the right to receive (a) only interest with respect to the obligations underlying such instrument or (b) both principal and interest payments derived from obligations underlying such instrument and the interest and principal payments with respect to such instrument provide a yield to maturity at par greater than 120% of the yield to maturity at par of the underlying obligations.

“Permitted Transferee”: Any Transferee of a Residual Certificate other than a Disqualified Organization or a non-U.S. Person.

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

“Physical Certificates”: The Residual Certificate.

“Pool Balance”: As to any Distribution Date, the aggregate of the Stated Principal Balances, as of the Close of Business on the first day of the month preceding the month in which such Distribution Date occurs, of the Mortgage Loans in all Loan Groups that were Outstanding Mortgage Loans on that day.

“Prepayment Penalty Amount”: With respect to any Mortgage Loan and each Distribution Date, all premiums or charges, if any, paid by Mortgagors under the related Mortgage Notes as a result of full or partial Principal Prepayments collected by the applicable Servicer during the immediately preceding Prepayment Period, but only to the extent required to be remitted to the Master Servicer on the applicable Servicer Remittance Date under the terms of the related Servicing Agreement.

“Prepayment Period”: With respect to any Distribution Date, the calendar month preceding the month in which such Distribution Date occurs.

“Primary Insurance Policy”: Mortgage guaranty insurance, if any, on an individual Mortgage Loan, as evidenced by a policy or certificate.

“Principal Balance”: As to any Mortgage Loan, other than a Liquidated Mortgage Loan, and any day, the related Cut-Off Date Principal Balance, minus all collections credited against the Principal Balance of such Mortgage Loan after the Cut-Off Date. For purposes of this definition, a Liquidated Mortgage Loan shall be deemed to have a Principal Balance equal to the Principal Balance of the related Mortgage Loan as of the final recovery of related Liquidation Proceeds and a Principal Balance of zero thereafter. As to any REO Property and any day, the Principal Balance of the related Mortgage Loan immediately prior to such Mortgage Loan becoming REO Property.

“Principal Deficiency Amount”: For any Distribution Date and for any Undercollateralized Group, the excess, if any, of the aggregate Class Certificate Principal Balance of such Undercollateralized Group immediately prior to such Distribution Date over the sum of the Principal Balances of the Mortgage Loans in the related Loan Group immediately prior to such Distribution Date.

“Principal Distribution Amount”: With respect to each Loan Group and any Distribution Date, the sum of (a) each scheduled payment of principal collected or advanced on the related Mortgage Loans by the related Servicer or the Master Servicer in respect of the related Due Period, (b) that portion of the Purchase Price, representing principal of any repurchased Mortgage Loan in that Loan Group, deposited to the Collection Account during the related Prepayment Period, (c) the principal portion of any related Substitution Adjustments with respect to that Loan Group deposited in the Collection Account during the related Prepayment Period, (d) the principal portion of all Insurance Proceeds received during the related Prepayment Period with respect to Mortgage Loans in that Loan Group that are not yet Liquidated Mortgage Loans, (e) the principal portion of all Net Liquidation Proceeds received during the related Prepayment Period with respect to Liquidated Mortgage Loans in that Loan Group (other than Recoveries), (f) all Principal Prepayments in part or in full on Mortgage Loans in that Loan Group applied by the Servicers or the Master Servicer during the related Prepayment Period, (g) all Recoveries received during the calendar month preceding the month of such Distribution Date and (h) on the Distribution Date on which the Trust is to be terminated pursuant to Section 10.01 hereof, that portion of the Termination Price in respect of principal for that Loan Group.

“Principal Prepayment”: Any payment of principal made by the Mortgagor on a Mortgage Loan that is received in advance of its scheduled Due Date and that is not accompanied by an amount of interest representing the full amount of scheduled interest due on any Due Date in any month or months subsequent to the month of prepayment.

“Private Certificates”: The Class B-4, Class B-5 and Class B-6 Certificates.

“Private Placement Memorandum”: The Private Placement Memorandum dated March 24, 2005, relating to the initial sale of the Class B-4, Class B-5 and Class B-6 Certificates.

“Pro Rata Share”: As to any Distribution Date and any Class of Subordinate Certificates, the portion of the Subordinate Principal Distribution Amount allocable to such Class, equal to the product of the (a) Subordinate Principal Distribution Amount on such date and (b) a fraction, the numerator of which is the related Class Certificate Principal Balance of that Class and the denominator of which is the aggregate of the Class Certificate Principal Balances of all the Classes of Subordinate Certificates.

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

“Prospectus”: The Prospectus Supplement, together with the accompanying prospectus, dated February 22, 2005, relating to the Senior Certificates and the Class B-1, Class B-2 and Class B-3 Certificates.

“Prospectus Supplement”: That certain Prospectus Supplement, dated March 24, 2005, relating to the initial sale of the Senior Certificates and the Class B-1, Class B-2 and Class B-3 Certificates.

“Purchase Price”: With respect to any Mortgage Loan or REO Property to be purchased pursuant to or as contemplated by Section 2.03 or Section 3.21 hereof, and as confirmed by an Officers’ Certificate from the Seller to the Trustee, an amount equal to the sum of (i) 100% of the Principal Balance thereof as of the date of purchase (or such other price as provided in Section 10.01), plus (ii) in the case of (x) a Mortgage Loan, accrued interest on such Principal Balance at the applicable Loan Rate from the Due Date as to which interest was last covered by a payment by the Mortgagor through the end of the calendar month in which the purchase is to be effected, and (y) an REO Property, the sum of (1) accrued interest on such Principal Balance at the applicable Loan Rate from the Due Date as to which interest was last covered by a payment by the Mortgagor plus (2) REO Imputed Interest for such REO Property for each calendar month commencing with the calendar month in which such REO Property was acquired and ending with the calendar month in which such purchase is to be effected, net of the total of all net rental income, Insurance Proceeds and Liquidation Proceeds that as of the date of purchase had been distributed as or to cover REO Imputed Interest, plus (iii) any unreimbursed Servicing Advances and any unpaid Expense Fees allocable to such Mortgage Loan or REO Property, plus (iv) in the case of a Mortgage Loan required to be purchased pursuant to Section 2.03 hereof, any costs and damages incurred by the Trust in connection with any violation by such Mortgage Loan of any predatory- or abusive-lending laws.

“Qualified Insurer”: A mortgage guaranty insurance company duly qualified as such under the laws of the state of its principal place of business and each state having jurisdiction over such insurer in connection with the insurance policy issued by such insurer, duly authorized and licensed in such states to transact a mortgage guaranty insurance business in such states and to write the insurance provided by the insurance policy issued by it, approved as a Fannie Mae-approved mortgage insurer and having a claims paying ability rating of at least “AA” or equivalent rating by a nationally recognized statistical rating organization. Any replacement insurer with respect to a Mortgage Loan must have at least as high a claims paying ability rating as the insurer it replaces had on the Closing Date.

“Qualified Substitute Mortgage Loan”: A mortgage loan substituted for a Deleted Mortgage Loan pursuant to the terms of this Agreement which must, on the date of such substitution, (i) have an outstanding principal balance, after application of all scheduled payments of principal and interest due during or prior to the month of substitution, not in excess of, and not more than 5% less than, the Principal Balance of the Deleted Mortgage Loan as of the Due Date in the calendar month during which the substitution occurs, (ii) have a maximum loan rate not less than the Maximum Loan Rate of the Deleted Mortgage Loan, (iii) have a gross margin equal to or greater than the Gross Margin of the Deleted Mortgage Loan, (iv) have the same Index as the Deleted Mortgage Loan, (v) have its next adjustment date not more than two months after the next Adjustment Date of the Deleted Mortgage Loan, (vi) have a remaining term to maturity not greater than (and not more than one year less than) that of the Deleted Mortgage Loan, (vii) be current as of the date of substitution, (viii) have a Loan-to-Value Ratio and a Loan-to-Collateral Value Ratio as of the date of substitution equal to or lower than the Loan-to-Value Ratio and the Loan-to-Collateral Value Ratio, respectively, of the Deleted Mortgage Loan as of such date, (ix) have been underwritten or re-underwritten in accordance with the same or substantially similar underwriting criteria and guidelines as the Deleted Mortgage Loan, (x) is of the same or better credit quality as the Deleted Mortgage Loan and (xi) conform to each representation and warranty set forth in Section 2.04 hereof applicable to the Deleted Mortgage Loan. In the event that one or more mortgage loans are substituted for one or more Deleted Mortgage Loans, the amounts described in clause (i) hereof shall be determined on the basis of aggregate principal balances, the terms described in clause (vi) hereof shall be determined on the basis of weighted average remaining term to maturity, the Loan-to-Value Ratio and Loan-to-Collateral Value Ratio described in clause (viii) hereof shall be satisfied as to each such mortgage loan and, except to the extent otherwise provided in this sentence, the representations and warranties described in clause (x) hereof must be satisfied as to each Qualified Substitute Mortgage Loan or in the aggregate, as the case may be.

“Rating Agency”: S&P and any successor thereto. If S&P or its successor shall no longer be in existence, “Rating Agency” shall include such nationally recognized statistical rating agency, or other comparable Person, as shall have been designated by the Depositor, notice of which designation shall be given to the Trustee and the Master Servicer.

“Realized Loss”: With respect to any Liquidated Mortgage Loan, the amount of loss realized equal to the portion of the Principal Balance remaining unpaid after application of all Net Liquidation Proceeds in respect of such Liquidated Mortgage Loan.

“Recognition Agreement”: With respect to any Cooperative Loan, an agreement between the related Cooperative Corporation and the originator of such Mortgage Loan to establish the rights of such originator in the related Cooperative Property.

“Record Date”: With respect to each Distribution Date and all Classes of Certificates, the last Business Day of the calendar month preceding the month in which such Distribution Date occurs.

“Recovery”: With respect to any Distribution Date and a Mortgage Loan that became a Liquidated Mortgage Loan in a month preceding the related Prepayment Period to such Distribution Date and with respect to which the related Realized Loss was allocated to one or more Classes of Certificates, an amount received in respect of such Liquidated Mortgage Loan during the related Prepayment Period, net of any reimbursable expenses.

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

“Regular Certificate”: Any Class A-1, Class A-2, Class A-3, Class A-4, Class A-5, Class B-1, Class B-2, Class B-3, Class B-4, Class B-5 or Class B-6 Certificate.

“Relief Act”: The Servicemembers Civil Relief Act or similar state or local law.

“Relief Act Reductions”: 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 Due Period as a result of the application of the Relief Act, the amount, if any, by which (i) interest collectible on that Mortgage Loan during such Due Period is less than (ii) one month’s interest on the Stated Principal Balance of such Mortgage Loan at the Loan Rate for such Mortgage Loan before giving effect to the application of the Relief Act.

“REMIC”: A “real estate mortgage investment conduit” within the meaning of Section 860D of the Code.

“REMIC Opinion”: An Independent Opinion of Counsel, to the effect that the proposed action described therein would not cause an Adverse REMIC Event.

“REMIC Provisions”: Provisions of the federal income tax law relating to real estate mortgage investment conduits which appear at Section 860A through 860G of Subchapter M of Chapter 1 of the Code, and related provisions, and regulations and rulings promulgated thereunder, as the foregoing may be in effect from time to time.

“Remittance Report”: The Master Servicer’s Remittance Report to the Securities Administrator providing information with respect to each Mortgage Loan which is provided no later than the second Business Day following each Determination Date and which shall contain such information as may be agreed upon by the Master Servicer and the Securities Administrator and which shall be sufficient to enable the Securities Administrator to prepare the related Distribution Date Statement.

“Rents from Real Property”: With respect to any REO Property, gross income of the character described in Section 856(d) of the Code.

“REO Account”: The account or accounts maintained by a Servicer in respect of an REO Property pursuant to the related Servicing Agreement.

“REO Disposition”: The sale or other disposition of an REO Property on behalf of the Trust.

“REO Imputed Interest”: As to any REO Property, for any calendar month during which such REO Property was at any time part of the Trust Fund, one month’s interest at the applicable Net Loan Rate on the Principal Balance of such REO Property (or, in the case of the first such calendar month, of the related Mortgage Loan if appropriate) as of the Close of Business on the Due Date in such calendar month.

“REO Principal Amortization”: With respect to any REO Property, for any calendar month, the excess, if any, of (a) the aggregate of all amounts received in respect of such REO Property during such calendar month, whether in the form of rental income, sale proceeds (including, without limitation, that portion of the Termination Price paid in connection with a purchase of all of the Mortgage Loans and REO Properties pursuant to Section 10.01 hereof that is allocable to such REO Property) or otherwise, net of any portion of such amounts (i) payable pursuant to the applicable provisions of the related Servicing Agreement in respect of the proper operation, management and maintenance of such REO Property or (ii) payable or reimbursable to the applicable Servicer pursuant to the applicable provisions of the related Servicing Agreement for unpaid Master Servicing Fees and Servicing Fees in respect of the related Mortgage Loan and unreimbursed Servicing Advances and Advances in respect of such REO Property or the related Mortgage Loan, over (b) the REO Imputed Interest in respect of such REO Property for such calendar month.

“REO Property”: A Mortgaged Property acquired by the applicable Servicer on behalf of the Trust through foreclosure or deed-in-lieu of foreclosure in accordance with the applicable provisions of the related Servicing Agreement.

“Request for Release” : A release signed by a Servicing Officer, in the form of Exhibit F attached hereto.

“Residential Dwelling”: Any one of the following: (i) a detached one-family dwelling, (ii) a detached two- to four-family dwelling, (iii) a one-family dwelling unit in a condominium project, (iv) a manufactured home, (v) a cooperative unit or (vi) a detached one-family dwelling in a planned unit development, none of which is a mobile home.

“Residual Certificate”: The Class A-R Certificate.

“Responsible Officer”: When used with respect to the Trustee, any director, any vice president, any assistant vice president, any associate or any other officer of the Trustee customarily performing functions similar to those performed by any of the above designated officers and, with respect to a particular matter, to whom such matter is referred because of such officer’s knowledge of and familiarity with the particular subject.

“Restricted Classes” : As defined in Section 5.01(e).

“Restricted Global Security”: As defined in Section 6.01.

“Retained Interest”: As to any Employee Loans originated by Thornburg and each Distribution Date, interest accrued on the Principal Balance thereof at the Retained Rate.

“Retained Interest Holder”: With respect to each Employee Loan, the Seller or any successor in interest by assignment or otherwise.

“Retained Rate”: As of the Cut-off Date, and for each Due Period thereafter, 0.00% per annum; provided, however, if the related Mortgagor of the Employee Loan ceases to be an employee or a director of Thornburg or its Affiliates, the amount of the increase in the per annum rate set forth in the related Mortgage Note.

“S&P”: Standard & Poor’s Ratings Services, a division of The McGraw-Hill Companies, Inc. or any successor thereto.

“Securities Administrator”: Wells Fargo Bank, N.A., or its successor in interest, or any successor securities administrator appointed as herein provided.

“Security Agreement”: With respect to any Cooperative Loan, the agreement between the owner of the related Cooperative Shares and the originator of the related Mortgage Note that defines the terms of the security interest in such Cooperative Shares and the related Proprietary Lease.

“Seller”: Thornburg, in its capacity as seller under this Agreement.

“Senior Certificate”: Any one of the Class A-1, Class A-2, Class A-3, Class A-4, Class A-5 or Class A-R Certificates.

“Senior Certificate Group”: Any of (a) the Class A-1 and Class A-R Certificates with respect to Loan Group 1, (b) the Class A-2 Certificates with respect to Loan Group 2, (c) the Class A-3 Certificates with respect to Loan Group 3, (d) the Class A-4 Certificates with respect to Loan Group 4 and (e) the Class A-5 Certificates with respect to Loan Group 5.

“Senior Certificateholder”: Any Holder of a Senior Certificate.

“Senior Credit Support Depletion Date”: The date on which the Class Certificate Principal Balance of each Class of Subordinate Certificates has been reduced to zero.

“Senior Percentage”: With respect to each Loan Group and any Distribution Date, the percentage equivalent of a fraction the numerator of which is the aggregate of the Class Certificate Principal Balances of the Classes of Senior Certificates relating to that Loan Group immediately prior to such Distribution Date and the denominator of which is the Loan Group Balance in the related Loan Group for such Distribution Date provided, however, that on any Distribution Date after a Senior Termination Date has occurred with respect to a Senior Certificate Group, the Senior Percentage for the related Loan Group will be equal to 0% and; provided, further, that on any Distribution Date after a Senior Termination Date has occurred with respect to four Senior Certificate Groups, the Senior Percentage of the Loan Group related to the remaining Senior Certificates is the percentage equivalent of a fraction, the numerator of which is the aggregate of the Certificate Principal Balances of each remaining Class of Senior Certificates immediately prior to such date and the denominator of which is the aggregate of the Certificate Principal Balances of all Classes of Certificates, immediately prior to such date.

“Senior Prepayment Percentage”: With respect to each Loan Group and any Distribution Date before April 2012, 100%. Except as provided herein, the Senior Prepayment Percentage for each Loan Group for any Distribution Date occurring on or after the seventh anniversary of the first Distribution Date will be as follows: (i) from April 2012 through March 2013, the related Senior Percentage plus 70% of the related Subordinate Percentage for that Distribution Date; (ii) from April 2013 through March 2014, the related Senior Percentage plus 60% of the related Subordinate Percentage for that Distribution Date; (iii) from April 2014 through March 2015, the related Senior Percentage plus 40% of the related Subordinate Percentage for that Distribution Date; (iv) from April 2015 through March 2016, the related Senior Percentage plus 20% of the related Subordinate Percentage for that Distribution Date; and (v) from and after April 2016, the related Senior Percentage for that Distribution Date; provided, however, that there shall be no reduction in the Senior Prepayment Percentage for any Loan Group unless the Step Down Conditions are satisfied; and provided, further , that if on any Distribution Date occurring on or after the Distribution Date in April 2012, the Senior Percentage for any Loan Group exceeds the initial Senior Percentage for such Loan Group, the related Senior Prepayment Percentage for that Distribution Date will again equal 100%.

Notwithstanding the above, (i) if on any Distribution Date prior to April 2008 the Two Times Test is satisfied, the Senior Prepayment Percentage for each Loan Group will equal the related Senior Percentage for such Distribution Date plus 50% of an amount equal to 100% minus the related Senior Percentage for such Distribution Date and (ii) if on any Distribution Date in or after April 2008 the Two Times Test is satisfied, the Senior Prepayment Percentage for each Loan Group will equal the related Senior Percentage for such Distribution Date.

“Senior Principal Distribution Amount”: With respect to each Loan Group and any Distribution Date, the sum of:

(1)

the related Senior Percentage of all amounts described in clauses (a) through (d) of the definition of “Principal Distribution Amount” for that Distribution Date;

(2)

with respect to each Mortgage Loan in that Loan Group which became a Liquidated Mortgage Loan during the related Prepayment Period, the lesser of

(x)

the related Senior Percentage of the Stated Principal Balance of that Mortgage Loan; and

(y)

the related Senior Prepayment Percentage of the amount of the Net Liquidation Proceeds allocable to principal received with respect to that Mortgage Loan; and

(3)

the related Senior Prepayment Percentage of the amounts described in clause (f) of the definition of “Principal Distribution Amount;”

provided, however , that on any Distribution Date after a Senior Termination Date has occurred with respect to four Senior Certificate Groups, the Senior Principal Distribution Amount for the remaining Senior Certificate Group will be calculated pursuant to the above formula based on all the Mortgage Loans rather than the Mortgage Loans in the related Loan Group only.

“Senior Termination Date”: For each Senior Certificate Group, the Distribution Date on which the aggregate of the Class Certificate Principal Balances of the related Senior Certificates is reduced to zero.

“Servicer”: Each of the several primary servicers of the Mortgage Loans as set forth and as individually defined in Exhibit N hereto and any successors thereto.

“Servicer Remittance Date”: With respect to each Mortgage Loan, the 18th day of each month, or the next Business Day if such 18th day is not a Business Day.

“Servicing Account”: Any account established and maintained for the benefit of the Master Servicer or the Trust by a Servicer with respect to the related Mortgage Loans and any REO Property, pursuant to the terms of the respective Servicing Agreement.

“Servicing Advances”: With respect to any Servicer or the Master Servicer, all customary, reasonable and necessary “out of pocket” costs and expenses (including reasonable attorneys’ fees and expenses) incurred by any Servicer or the Master Servicer in the performance of its servicing obligations hereunder, including, but not limited to, the cost of (i) the preservation, restoration, inspection and protection of the Mortgaged Property, (ii) any enforcement or judicial proceedings, including foreclosures, (iii) the management and liquidation of the REO Property and (iv) compliance with the obligations under Article III hereof or the related Servicing Agreements.

“Servicing Agreement”: The servicing agreements relating to the Mortgage Loans as set forth in Exhibit N hereto, servicing arrangements for any Mortgage Loans under the Seller’s Correspondent Sellers Guide, and any other servicing agreement entered into between a successor servicer and the Seller or the Trustee on behalf of the Trust pursuant to the terms hereof.

“Servicing Fee”: With respect to each Servicer and each Mortgage Loan serviced by such Servicer and for any calendar month, the fee payable to such Servicer determined pursuant to the related Servicing Agreement.

“Servicing Fee Rate”: With respect to each Mortgage Loan, the per annum servicing fee rate set forth on the Mortgage Loan Schedule.

“Servicing Officer”: Any officer of a Master Servicer or Servicer involved in, or responsible for, the administration and servicing of Mortgage Loans, whose name and specimen signature appear on a list of servicing officers furnished by the Master Servicer to the Trustee and the Depositor on the Closing Date, as such list may from time to time be amended.

“Significant Modification”: As defined in Section 3.21.

“Significant Modification Loan”: As defined in Section 3.21.

“Six-Month LIBOR”: The average of interbank offered rates for six-month U.S. dollar deposits in the London market based on quotations of major banks.

“Six-Month LIBOR Indexed”: Indicates a Mortgage Loan that has an adjustable Loan Rate calculated on the basis of the Six-Month LIBOR index.

“Startup Day”: As defined in Section 9.01(b) hereof.

“Stated Principal Balance”: With respect to any Mortgage Loan: (a) as of the Distribution Date in April 2005, the Cut-Off Date Principal Balance of such Mortgage Loan, (b) thereafter as of any date of determination up to and including the Distribution Date on which the proceeds, if any, of a Liquidation Event with respect to such Mortgage Loan would be distributed, the outstanding principal balance of such Mortgage Loan as of the Cut-Off Date, as shown in the Mortgage Loan Schedule, minus, in the case of each Mortgage Loan, the sum of (i) the principal portion of each Monthly Payment due on a Due Date subsequent to the Cut-Off Date, whether or not received, (ii) all Principal Prepayments received after the Cut-Off Date, to the extent distributed pursuant to Section 5.01 before such date of determination and (iii) all Liquidation Proceeds and Insurance Proceeds applied by the applicable Servicer as recoveries of principal in accordance with the applicable provisions of the related Servicing Agreement, to the extent distributed pursuant to Section 5.01 before such date of determination; and (c) as of any date of determination subsequent to the Distribution Date on which the proceeds, if any, of a Liquidation Event with respect to such Mortgage Loan would be distributed, zero. With respect to any REO Property: (x) as of any date of determination up to and including the Distribution Date on which the proceeds, if any, of a Liquidation Event with respect to such REO Property would be distributed, an amount (not less than zero) equal to the Stated Principal Balance of the related Mortgage Loan as of the date on which such REO Property was acquired on behalf of the Trust, minus the aggregate amount of REO Principal Amortization in respect of such REO Property for all previously ended calendar months, to the extent distributed pursuant to Section 5.01 before such date of determination; and (y) as of any date of determination subsequent to the Distribution Date on which the proceeds, if any, of a Liquidation Event with respect to such REO Property would be distributed, zero.

“Step Down Conditions”: As of any Distribution Date on which any decrease in any Senior Prepayment Percentage may apply, (i) the outstanding Principal Balance of all Mortgage Loans 60 days or more Delinquent (including Mortgage Loans in REO and foreclosure) (averaged over the preceding six month period), as a percentage of the aggregate of the Class Certificate Principal Balances of the Classes of Subordinate Certificates on such Distribution Date, does not equal or exceed 50% and (ii) cumulative Realized Losses with respect to all of the Mortgage Loans do not exceed:

for any Distribution Date on or after the seventh anniversary until the eighth anniversary of the first Distribution Date, 30% of the aggregate Certificate Principal Balance of the Subordinate Certificates as of the Closing Date,

for any Distribution Date on or after the eighth anniversary until the ninth anniversary of the first Distribution Date, 35% of the aggregate Certificate Principal Balance of the Subordinate Certificates as of the Closing Date,

for any Distribution Date on or after the ninth anniversary until the tenth anniversary of the first Distribution Date, 40% of the aggregate Certificate Principal Balance of the Subordinate Certificates as of the Closing Date,

for any Distribution Date on or after the tenth anniversary until the eleventh anniversary of the first Distribution Date, 45% of the aggregate Certificate Principal Balance of the Subordinate Certificates as of the Closing Date, and

for any Distribution Date on or after the eleventh anniversary anniversary of the first Distribution Date, 50% of the aggregate Certificate Principal Balance of the Subordinate Certificates as of the Closing Date.

“Subordinate Certificate”: Any one of the Class B-1, Class B-2, Class B-3, Class B-4, Class B-5 or Class B-6 Certificates.

“Subordinate Certificate Pass-Through Rate”: With respect to each Class of Subordinate Certificates and any Distribution Date, the rate per annum equal to the weighted average of the Net WACs for Loan Group 1, Loan Group 2, Loan Group 3, Loan Group 4 and Loan Group 5 (weighted on the basis of the respective Subordinate Components).

“Subordinate Component”: With respect to each Loan Group and any Distribution Date, the excess of the related Loan Group Balance for such Distribution Date over the aggregate Class Certificate Principal Balance of the related Senior Certificate Group immediately preceding such Distribution Date. The designation “1,” “2,” “3,” “4” or “5” appearing after the corresponding Loan Group designation is used to indicate a Subordinate Component allocable to Loan Group 1, Loan Group 2, Loan Group 3, Loan Group 4 and Loan Group 5, respectively.

“Subordinate Percentage”: With respect to each Loan Group and any Distribution Date, the difference between 100% and the related Senior Percentage for such Loan Group and Distribution Date; provided, however , that on any Distribution Date occurring after a Senior Termination Date has occurred with respect to four Senior Certificate Groups, the Subordinate Percentage will represent the entire interest of the Subordinate Certificates in the Mortgage Loans and will equal the difference between 100% and the related Senior Percentage for such Distribution Date.

“Subordinate Prepayment Percentage”: With respect to each Loan Group and any Distribution Date, the difference between 100% and the related Senior Prepayment Percentage for such Distribution Date.

“Subordinate Principal Distribution Amount”: With respect to each Loan Group and any Distribution Date, an amount equal to the sum of:

(1)

the related Subordinate Percentage of all amounts described in clauses (a) through (d) of the definition of “Principal Distribution Amount” for that Loan Group and Distribution Date;

(2)

with respect to each Mortgage Loan in such Loan Group that became a Liquidated Mortgage Loan during the related Prepayment Period, the amount of the Net Liquidation Proceeds allocated to principal received with respect thereto remaining after application thereof pursuant to clause (2) of the definition of “Senior Principal Distribution Amount” for that Loan Group and Distribution Date, up to the related Subordinate Percentage of the Stated Principal Balance of such Mortgage Loan; and

(3)

the related Subordinated Prepayment Percentage of all amounts described in clause (f) of the definition of “Principal Distribution Amount” for such Loan Group and Distribution Date;

provided, however , that on any Distribution Date occurring after a Senior Termination Date has occurred with respect to four Senior Certificate Groups, the Subordinate Principal Distribution Amount will not be calculated by Loan Group but will equal the amount calculated pursuant to the formula set forth above based on the applicable Subordinate Percentage or Subordinate Prepayment Percentage, as applicable, for such Distribution Date with respect to all the Mortgage Loans rather than the Mortgage Loans in the related Loan Group only.

“Substitution Adjustment”: As defined in Section 2.03(d) hereof.

“Tax Returns”: The federal income tax return on Internal Revenue Service Form 1066, U.S. Real Estate Mortgage Investment Conduit Income Tax Return, including Schedule Q thereto, Quarterly Notice to Residual Interest Holders of the REMIC Taxable Income or Net Loss Allocation, or any successor forms, to be filed on behalf of each of the REMICs created hereunder under the REMIC Provisions, together with any and all other information reports or returns that may be required to be furnished to the Certificateholders or filed with the Internal Revenue Service or any other governmental taxing authority under any applicable provisions of federal, state or local tax laws.

“Termination Price”: As defined in Section 10.01(a) hereof.

“Thornburg”: Thornburg Mortgage Home Loans, Inc., a Delaware corporation, and its successors and assigns.

“Transfer”: Any direct or indirect transfer or sale of any Ownership Interest in a Residual Certificate.

“Transfer Affidavit”: As defined in Section 6.02(e)(ii) hereof.

“Transferee”: Any Person who is acquiring by Transfer any Ownership Interest in a Certificate.

“Trust”: Thornburg Mortgage Securities Trust 2005-1, the Delaware statutory trust created hereunder.

“Trust Fund”: The segregated pool of assets subject hereto, constituting the primary trust created hereby and to be administered hereunder, with respect to which a REMIC election is to be made, such Trust Fund consisting of: (i) such Mortgage Loans as from time to time are subject to this Agreement, together with the Mortgage Files relating thereto, and together with all collections thereon and proceeds thereof (but not including any Prepayment Penalty Amounts), (ii) any REO Property, together with all collections thereon and proceeds thereof, (iii) the Trustee’s rights with respect to the Mortgage Loans under all insurance policies required to be maintained pursuant to this Agreement and any proceeds thereof, (iv) the Depositor’s rights under the Mortgage Loan Purchase Agreement (including any security interest created thereby); (v) the Depositor's security interest in the Additional Collateral, (vi) the Collection Account, the Distribution Account (subject to the last sentence of this definition), any REO Account and such assets that are deposited therein from time to time and any investments thereof, together with any and all income, proceeds and payments with respect thereto, (vii) all right, title and interest of the Depositor in and to each security or pledge agreement in respect of Additional Collateral and (viii) all right, title and interest of the Seller in and to each of the Servicing Agreements. Notwithstanding the foregoing, however, the Trust Fund specifically excludes (1) all payments and other collections of interest and principal due on the Mortgage Loans on or before the Cut-Off Date and principal received before the Cut-Off Date (except any principal collected as part of a payment due after the Cut-Off Date), (2) all income and gain realized from Permitted Investments of funds on deposit in the Collection Account and the Distribution Account, (3) any Prepayment Penalty Amounts and (4) any Retained Interest.

“Trustee”: Deutsche Bank National Trust Company, a national banking association, its successors or assigns, or any successor trustee appointed as herein provided.

“Trustee Fee”: As to any Distribution Date, an amount equal to one-twelfth of the Trustee Fee Rate multiplied by the aggregate of the Principal Balances of all the Mortgage Loans (including Mortgage Loans which are REO Property) as of the beginning of the related Due Period.

“Trustee Fee Rate”: 0.00054% per annum.

“Two Times Test”: As to any Distribution Date, (i) the Aggregate Subordinate Percentage is at least two times the Aggregate Subordinate Percentage as of the Closing Date; (ii) the aggregate of the Principal Balances of all Mortgage Loans Delinquent 60 days or more (including Mortgage Loans in REO and foreclosure) (averaged over the preceding six-month period), as a percentage of the aggregate of the Class Certificate Principal Balances of the Subordinate Certificates, does not equal or exceed 50%; and (iii) on or after the Distribution Date in April 2008, cumulative Realized Losses do not exceed 30% of the Original Subordinated Principal Balance, or prior to the Distribution Date in April 2008, cumulative Realized Losses do not exceed 20% of the Original Subordinated Principal Balance.

“Undercollateralized Group” : With respect to any Distribution Date, any Class of Senior Certificates as to which the aggregate Class Certificate Principal Balance thereof, after giving effect to distributions pursuant to Section 5.01(a) on such date, is greater than the Loan Group Balance of the related Loan Group for such Distribution Date.

“Underwriter’s Exemption”: Prohibited Transaction Exemption 97-34, 62 Fed. Reg. 39021 (1997), as amended (or any successor thereto), or any substantially similar administrative exemption granted by the U.S. Department of Labor.

“Uninsured Cause”: Any cause of damage to a Mortgaged Property such that the complete restoration of such property is not fully reimbursable by the hazard insurance policies required to be maintained on such Mortgaged Property.

“United States Person” or “U.S. Person”: A citizen or resident of the United States, a corporation, partnership or other entity treated as a corporation or partnership for federal income tax purposes (other than a partnership that is not treated as a U.S. Person pursuant to any applicable Treasury regulations) created or organized in, or under the laws of, the United States, any state thereof or the District of Columbia, or an estate the income of which from sources without the United States is includible in gross income for United States federal income tax purposes regardless of its connection with the conduct of a trade or business within the United States, or a trust if a court within the United States is able to exercise primary supervision over the administration of the trust and one or more United States persons have authority to control all substantial decisions of the trust. The term “United States” shall have the meaning set forth in Section 7701 of the Code or successor provisions.

“Unpaid Interest Shortfall Amount”: With respect to each Class of Certificates and (i) the first Distribution Date, zero, and (ii) any Distribution Date after the first Distribution Date, the amount, if any, by which (1)(a) the Monthly Interest Distributable Amount for that Class for the immediately preceding Distribution Date exceeds (b) the aggregate amount distributed on that Class in respect of such Monthly Interest Distributable Amount on the preceding Distribution Date plus (2) any such shortfalls remaining unpaid from prior Distribution Dates.

“Upper Tier REMIC”: As described in the Preliminary Statement.

“Value”: With respect to any Mortgage Loan and the related Mortgaged Property, the lesser of:

(i)

the value of such Mortgaged Property as determined by an appraisal made for the originator of the Mortgage Loan at the time of origination of the Mortgage Loan by an appraiser who met the minimum requirements of Fannie Mae and Freddie Mac; and

(ii)

the purchase price paid for the related Mortgaged Property by the Mortgagor with the proceeds of the Mortgage Loan;

provided, however, that in the case of a Refinancing Mortgage Loan, such value of the Mortgaged Property is based solely upon the value determined by an appraisal made for the originator of such Refinancing Mortgage Loan at the time of origination by an appraiser who met the minimum requirements of Fannie Mae and Freddie Mac.

“Voting Rights”: The portion of the voting rights of all of the Certificates which is allocated to any Certificate. 99% of the voting rights shall be allocated among the Classes of Certificates, pro rata, based on a fraction, expressed as a percentage, the numerator of which is the Class Certificate Principal Balance of such Class and the denominator of which is the aggregate of the Class Certificate Principal Balances then outstanding and 1% of the voting rights shall be allocated to the Holder of the Class A-R Certificate; provided, however , that when none of the Regular Certificates is outstanding, 100% of the voting rights shall be allocated to the Holder of the Class A-R Certificate. The voting rights allocated to a Class of Certificates shall be allocated among all Holders of such Class, pro rata, based on a fraction the numerator of which is the Certificate Principal Balance or Certificate Notional Balance of each Certificate of such Class and the denominator of which is the Class Certificate Principal Balance or Class Certificate Notional Balance of such Class; provided, however , that any Certificate registered in the name of the Master Servicer, the Securities Administrator, the Trustee, the Delaware Trustee or any of their respective affiliates shall not be included in the calculation of Voting Rights.

“Writedown Amount”: The reduction described in Section 5.03(c).

SECTION 1.02. Accounting.

Unless otherwise specified herein, for the purpose of any definition or calculation, whenever amounts are required to be netted, subtracted or added or any distributions are taken into account such definition or calculation and any related definitions or calculations shall be determined without duplication of such functions.

ARTICLE IA

ORGANIZATION OF TRUST

Section 1A.01. Name of Trust . The name of the Trust formed under the Original Trust Agreement is “Thornburg Mortgage Securities Trust 2005-1,” in which name the Trustee may conduct the business and affairs of the Trust, make and execute contracts and agreements on behalf of the Trust and sue and be sued.

Section 1A.02. Office . The office of the Trust shall be in care of the Trustee. The office of the Trust shall be located at its Corporate Trust Office, or at such other address as the Trustee may designate by written notice to the Certificateholders, each Rating Agency and the other parties to this Agreement.

Section 1A.03. Declaration of Trust . Under the Original Trust Agreement and effective as of the date hereof, the Depositor appointed Deutsche Bank National Trust Company as Trustee of the Trust, to have all the rights powers and duties set forth herein. Under the Original Trust Agreement and effective as of the date hereof, the Depositor appointed Deutsche Bank Trust Company Delaware to act as Delaware Trustee. It is the intention of the parties hereto that the Trust constitute a statutory trust under Chapter 38 of Title 12 of the Delaware Code, 12 Del . Code § 3801 et seq ., as the same may be amended from time to time ( the “Delaware Statutory Trust Statute” or “ DSTS ”), and that this Agreement amends and restates in its entirety the Original Trust Agreement and constitutes the governing instrument of such statutory trust. Effective as of the date hereof, the Trustee shall have all rights, powers and duties set forth in the Delaware Statutory Trust Statute with respect to accomplishing the purposes of the Trust. It is hereby confirmed that the Trustee and the Delaware Trustee were authorized to execute the Original Trust Agreement and to file a Certificate of Trust in substantially the form of Exhibit M with the Secretary of State of Delaware, on behalf of the Trust.

Section 1A.04. Purpose and Powers . The purposes of the Trust are (i) to issue the Certificates and to sell the Certificates to or at the direction of the Depositor; (ii) with the proceeds of the sale of the Certificates, to purchase the Mortgage Loans and all related assets and to pay any organizational start-up and transactional expenses of the Trust; (iii) to enter into this Agreement and to perform its obligations hereunder; (iv) to engage in those activities, including entering into agreements, that are necessary, suitable or convenient to accomplish the foregoing or are incidental thereto or connected therewith; and (v) subject to compliance with this Agreement, to engage in such other activities as may be required in connection with the conservation of the assets of the Trust and the making of distributions to the Certificateholders. The Trust is hereby authorized to engage in the foregoing activities. The Trust shall not engage in any activity other than in connection with the foregoing or other than as required or authorized by the terms of this Agreement.

Section 1A.05. Liability of the Certificateholders . The Certificateholders shall be entitled to the same limitation of personal liability extended to stockholders of private corporations for profit organized under the General Corporation Law of the State of Delaware.

Section 1A.06. Title To Trust Property . Legal title to the assets of the Trust shall be vested at all times in the Trust as a separate legal entity except where applicable law in any jurisdiction requires title to any part of the Trust to be vested in a trustee or trustees, in which case title shall be deemed to be vested in the Trustee, a co-trustee and/or a separate trustee, as the case may be, and in each case on behalf of the Trust. The Certificateholders shall not have legal title to any part of the assets of the Trust. No transfer by operation of law or otherwise of any interest of the Certificateholders shall operate to terminate this Agreement or the trusts hereunder or entitle any transferee to an accounting or to the transfer to it of any part of the assets of the Trust. The Trustee, in such capacity and in its capacity as Custodian, is hereby authorized to hold all assets of the Trust on behalf of the Trust, for the benefit of the Certificateholders.

Section 1A.07. Situs of Trust . The Trust will be located in the State of Delaware and administered in the States of Delaware, California and Maryland. Nothing herein shall restrict or prohibit the Trustee from having employees within or without the State of Delaware. The Trust may also be qualified to do business in the State of New York.

Section 1A.08. The Delaware Trustee . (a) The Delaware Trustee is appointed to serve as the trustee of the Trust in the State of Delaware for the sole purpose of satisfying the requirement of Section 3807(a) of the DSTS that the Trust have at least one trustee with a principal place of business in the State of Delaware. It is understood and agreed by the parties hereto that the Delaware Trustee shall have none of the duties, obligations or liabilities of the Trustee.

(b)

The duties of the Delaware Trustee shall be limited to (i) accepting legal process served on the Trust in the State of Delaware and (ii) the execution of any certificates required to be filed with the Delaware Secretary of State which the Delaware Trustee is required to execute under Section 3811 of the DSTS. To the extent that, at law or in equity, the Delaware Trustee has duties (including fiduciary duties) and liabilities relating thereto to the Trust or the Certificateholders, it is hereby understood and agreed by the other parties hereto that such duties and liabilities are replaced by the duties and liabilities of the Delaware Trustee expressly set forth in this Agreement. The Delaware Trustee shall have no liability for the acts or omissions of the Trustee. Except as provided above, the Delaware Trustee shall not be deemed a trustee and shall have no management responsibilities or owe any fiduciary duties to the Trust or the Certificateholders.

(c)

The Delaware Trustee may be removed by the Trustee upon 30 days prior written notice to the Delaware Trustee. The Delaware Trustee may resign upon 30 days prior written notice to the Trustee. No resignation or removal of the Delaware Trustee shall be effective except upon the appointment of a successor Delaware Trustee. If no successor has been appointed within such 30 day period, the Delaware Trustee or the Trustee may, at the expense of the Trust, petition a court to appoint a successor Delaware Trustee.

(d)

Any Person into which the Delaware Trustee may be merged or with which it may be consolidated, or any Person resulting from any merger or consolidation to which the Delaware Trustee shall be a party, or any Person which succeeds to all or substantially all of the corporate trust business of the Delaware Trustee, shall be the successor Delaware Trustee under this Agreement without the execution, delivery or filing of any paper or instrument or further act to be done on the part of the parties hereto, except as may be required by applicable law.

(e)

The Delaware Trustee shall be entitled to all of the same rights, protections indemnities and immunities under this Agreement and with respect to the Trust as the Trustee. No amendment or waiver of any provision of this Agreement which adversely affects the Delaware Trustee shall be effective against it without its prior written consent.

The Delaware Trustee shall not be liable for the acts or omissions of the Trustee, nor shall the Delaware Trustee be liable for supervising or monitoring the performance and the duties and obligations of the Trustee or the Trust under this Agreement or any related document. The Delaware Trustee shall not be personally liable under any circumstances, except for its own willful misconduct, bad faith or gross negligence. In particular, but not by way of limitation:

(i)

the Delaware Trustee shall not be personally liable for any error of judgment made in good faith;

(ii)

no provision of this Agreement shall require the Delaware Trustee to expend or risk its personal funds or otherwise incur any financial liability in the performance of its rights or powers hereunder, if the Delaware Trustee shall have reasonable grounds for believing that the payment of such funds or adequate indemnity against such risk or liability is not reasonably assured or provided to it;

(iii)

under no circumstances shall the Delaware Trustee be personally liable for any representation, warranty, covenant, agreement, or indebtedness of the Trust;

(iv)

the Delaware Trustee shall not be personally responsible for or in respect of the validity or sufficiency of this Agreement or for the due execution hereof by any other party hereto;

(v)

the Delaware Trustee shall incur no liability to anyone in acting upon any signature, instrument, notice, resolution, request, consent, order, certificate, report, opinion, bond or other document or paper reasonably believed by it to be genuine and reasonably believed by it to be signed by the proper party or parties. The Delaware Trustee may accept a certified copy of a resolution of the board of directors or other governing body of any corporate party as conclusive evidence that such resolution has been duly adopted by such body and that the same is in full force and effect. As to any fact or matter the manner of ascertainment of which is not specifically prescribed herein, the Delaware Trustee may for all purposes hereof rely on a certificate, signed by the Trustee, the Securities Administrator or the Master Servicer, as applicable, as to such fact or matter, and such certificate shall constitute full protection to the Delaware Trustee for any action taken or omitted to be taken by it in good faith in reliance thereon;

(vi)

in the exercise or administration of the Trust hereunder, the Delaware Trustee (a) may act directly or through agents or attorneys pursuant to agreements entered into with any of them, and the Delaware Trustee shall not be liable for the default or misconduct of such agents or attorneys if such agents or attorneys shall have been selected by the Delaware Trustee in good faith and with due care and (b) may consult with counsel, accountants and other skilled persons to be selected by it in good faith and with due care and employed by it, and it shall not be liable for anything done, suffered or omitted in good faith by it in accordance with the advice or opinion of any such counsel, accountants or other skilled persons; and

(vii)

except as expressly provided in this Section 1A.08, in accepting and performing the trusts hereby created the Delaware Trustee acts solely as trustee hereunder and not in its individual capacity, and all persons having any claim against the Delaware Trustee by reason of the transactions contemplated by this Agreement shall look only to the Trust Fund for payment or satisfaction thereof.

(f)

In the event of the appointment of a successor Delaware Trustee, such successor shall cause an amendment to the Certificate of Trust to be filed with the Secretary of State of Delaware in accordance with Section 3810 of the DSTS, indicating the change of such Delaware Trustee’s identity. In addition, until the termination of the Trust and this Agreement, either the Trustee or Delaware Trustee shall at all times fulfill the requirements of the DSTS.

(g)

Upon the winding up of the Trust, the Trustee shall cause the certificate of trust to be cancelled by filing a certificate of cancellation with the Secretary of State of Delaware.

Section 1A.09 Separateness Provisions . The Trust shall not commingle its assets with those of any other entity. The Trust shall maintain its financial and accounting books and records separate from those of any other entity. Except as expressly set forth herein, the Trust shall pay its indebtedness, operating expenses and liabilities from its own funds, and the Trust shall neither incur any indebtedness nor pay the indebtedness, operating expenses and liabilities of any other entity. The Trust shall not engage in any dissolution, liquidation, consolidation, merger or sale of assets except as specifically provided for herein. The Trust shall maintain appropriate minutes or other records of all appropriate actions and shall maintain its office separate from the offices of the Depositor or any of its Affiliates. The Trust shall not engage in any business activity other than as contemplated by this Agreement and related documentation. The Trust shall not form, or cause to be formed, any subsidiaries and shall not own or acquire any asset other than as contemplated by this Agreement and related documentation. Other than as contemplated by this Agreement and related documentation, the Trust shall not follow the directions or instructions of the Depositor. The Trust shall conduct its own business in its own name. The Trust shall observe all formalities required under the Delaware Statutory Trust Statute. The Trust shall not hold out its credit as being available to satisfy the obligations of any other person or entity. The Trust shall not acquire the obligations or securities of its Affiliates or the Seller. Other than as contemplated by this Agreement and related documentation, the Trust shall not pledge its assets for the benefit of any other person or entity. The Trust shall correct any known misunderstanding regarding its separate identity. The Trust shall not identify itself as a division of any other person or entity.

For accounting purposes, the Trust shall be treated as an entity separate and distinct from any Certificateholder. The pricing and other material terms of all transactions and agreements to which the Trust is a party shall be intrinsically fair to all parties thereto. This Agreement is and shall be the only agreement among the parties hereto with respect to the creation, operation and termination of the Trust.

ARTICLE II

CONVEYANCE OF MORTGAGE LOANS;
ORIGINAL ISSUANCE OF CERTIFICATES

SECTION 2.01. Conveyance of Mortgage Loans .

The Depositor, concurrently with the execution and delivery hereof, does hereby transfer, assign, set over and otherwise convey to the Trustee without recourse for the benefit of the Certificateholders all the right, title and interest of the Depositor, including any security interest therein for the benefit of the Depositor, in and to (i) each Mortgage Loan (other than the right to receive any Retained Interest or any Prepayment Penalty Amounts) identified on the Mortgage Loan Schedule, including the related Cut-Off Date Principal Balance, all interest due thereon after the Cut-Off Date and all collections in respect of interest and principal due after the Cut-Off Date; (ii) all the Depositor’s right, title and interest in and to the Collection Account and all amounts from time to time credited to and to the proceeds of the Collection Account, the Distribution Account and all amounts from time to time credited to and the proceeds of the Distribution Account; (iii) any real property that secured each such Mortgage Loan and that has been acquired by foreclosure or deed in lieu of foreclosure; (iv) the Depositor’s interest in any insurance policies in respect of the Mortgage Loans; (v) the Depositor’s security interest in the Additional Collateral; (vi) all proceeds of any of the foregoing; and (vii) all other assets included or to be included in the Trust Fund. Such assignment includes all interest and principal due to the Depositor or the Master Servicer after the Cut-Off Date with respect to the Mortgage Loans.

Concurrently with the execution and delivery of this Agreement, the Depositor does hereby assign to the Trustee all of its rights and interest under the Mortgage Loan Purchase Agreement, including all rights of the Seller under the Servicing Agreements to the extent assigned in the Mortgage Loan Purchase Agreement. The Trustee hereby accepts such assignment, and shall be entitled to exercise all rights of the Depositor under the Mortgage Loan Purchase Agreement and the Seller under the Servicing Agreements as if, for such purpose, it were the Depositor or the Seller, as applicable. The foregoing sale, transfer, assignment, set-over, deposit and conveyance does not and is not intended to result in 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 herein.

In addition, with respect to any Additional Collateral Mortgage Loan, the Depositor does hereby transfer, assign, set-over and otherwise convey to the Trustee without recourse (except as provided herein) (i) its rights as assignee under any security agreements, pledge agreements or guarantees relating to the Additional Collateral supporting any Additional Collateral Mortgage Loan, (ii) its security interest in and to any Additional Collateral and (iii) its right to receive payments in respect of any Additional Collateral Mortgage Loan pursuant to the related Servicing Agreement.

For purposes of complying with the requirements of the Asset-Backed Securities Facilitation Act of the State of Delaware, 6 Del. C. § 2701A, et seq. (the “ Securitization Act ”), each of the parties hereto hereby agrees that:

(i)

any property, assets or rights purported to be transferred, in whole or in part, by the Depositor pursuant to this Agreement shall be deemed to no longer be the property, assets or rights of the Depositor;

(ii)

none of the Depositor, its creditors or, in any insolvency proceeding with respect to the Depositor or the Depositor’s property, a bankruptcy trustee, receiver, debtor, debtor in possession or similar person, to the extent the issue is governed by Delaware law, shall have any rights, legal or equitable, whatsoever to reacquire (except pursuant to a provision of this Agreement), reclaim, recover, repudiate, disaffirm, redeem or recharacterize as property of the Depositor any property, assets or rights purported to be transferred, in whole or in part, by the Depositor pursuant to this Agreement (including the Assignment);

(iii)

in the event of a bankruptcy, receivership or other insolvency proceeding with respect to the Depositor or the Depositor’s property, to the extent the issue is governed by Delaware law, such property, assets and rights shall not be deemed to be part of the Depositor’s property, assets, rights or estate; and

(iv)

the transaction contemplated by this Agreement shall constitute a “securitization transaction” as such term is used in the Securitization Act.

In connection with such transfer and assignment, the Seller, on behalf of the Depositor, does hereby deliver on the Closing Date, unless otherwise specified in this Section 2.01, to, and deposit with the Trustee, or the Custodian as its designated agent, the following documents or instruments with respect to each Mortgage Loan (a “ Mortgage File ”) so transferred and assigned:

(i)

the original Mortgage Note, endorsed either on its face or by allonge attached thereto in blank or in the following form: “Pay to the order of Deutsche Bank National Trust Company, as Trustee for Thornburg Mortgage Securities Trust 2005-1, without recourse”, or with respect to any lost Mortgage Note, an original Lost Note Affidavit stating that the original mortgage note was lost, misplaced or destroyed, together with a copy of the related mortgage note; provided, however , that such substitutions of Lost Note Affidavits for original Mortgage Notes may occur only with respect to Mortgage Loans the aggregate Cut-Off Date Principal Balance of which is less than or equal to 2% of the Cut-Off Date Aggregate Principal Balance;

(ii)

the original of any guarantee, security agreement or pledge agreement relating to any Additional Collateral, if applicable, and executed in connection with the Mortgage Note, assigned to the Trustee on behalf of the Trust;

(iii)

except as provided below, for each Mortgage Loan that is not a MERS Mortgage Loan, the original Mortgage, and in the case of each MERS Mortgage Loan, the original Mortgage, noting the presence of the MIN for that Mortgage Loan and either language indicating that the Mortgage Loan is a MOM Loan if the Mortgage Loan is a MOM Loan, or if such Mortgage Loan was not a MOM Loan at origination, the original Mortgage and the assignment to MERS, in each case with evidence of recording thereon, and the original recorded power of attorney, if the Mortgage was executed pursuant to a power of attorney, with evidence of recording thereon or, if such Mortgage or power of attorney has been submitted for recording but has not been returned from the applicable public recording office, has been lost or is not otherwise available, a copy of such Mortgage or power of attorney, as the case may be, together with an Officer’s Certificate of the Seller certifying that the copy of such Mortgage delivered to the Trustee (or its Custodian) is a true copy and that the original of such Mortgage has been forwarded to the public recording office, or, in the case of a Mortgage that has been lost, a copy thereof (certified as provided for under the laws of the appropriate jurisdiction) and a written Opinion of Counsel (delivered at the Seller’s expense) acceptable to the Trustee and the Depositor that an original recorded Mortgage is not required to enforce the Trustee’s interest in the Mortgage Loan;

(iv)

the original of each assumption, modification or substitution agreement, if any, relating to the Mortgage Loans, or, as to any assumption, modification or substitution agreement which cannot be delivered on or prior to the Closing Date because of a delay caused by the public recording office where such assumption, modification or substitution agreement has been delivered for recordation, a photocopy of such assumption, modification or substitution agreement, pending delivery of the original thereof, together with an Officer’s Certificate of the Seller certifying that the copy of such assumption, modification or substitution agreement delivered to the Trustee (or its custodian) on behalf of the Trust is a true copy and that the original of such agreement has been forwarded to the public recording office;

(v)

in the case of each Mortgage Loan that is not a MERS Mortgage Loan, an original Assignment of Mortgage, in form and substance acceptable for recording. The Mortgage shall be assigned to “Deutsche Bank National Trust Company, as Trustee for Thornburg Mortgage Securities Trust 2005-1, without recourse;”

(vi)

in the case of each Mortgage Loan that is not a MERS Mortgage Loan, an original copy of any intervening Assignment of Mortgage showing a complete chain of assignments, or, in the case of an intervening Assignment of Mortgage that has been lost, a written Opinion of Counsel (delivered at the Seller’s expense) acceptable to the Trustee that such original intervening Assignment of Mortgage is not required to enforce the Trustee’s interest in the Mortgage Loans;

(vii)

the original Primary Insurance Policy, if any, or certificate, if any;

(viii)

the original or a certified copy of lender’s title insurance policy;

(ix)

the original or copies of each assumption, modification, written assurance or substitution agreement, if any; and

(x)

with respect to any Cooperative Loan, the Cooperative Loan Documents.

In connection with the assignment of any MERS Mortgage Loan, the Seller agrees that it will take (or shall cause the applicable Servicer to take), at the expense of the Seller (with the cooperation of the Depositor, the Trustee and the Master Servicer), such actions as are necessary to cause the MERS® System to indicate that such Mortgage Loans have been assigned by the Seller to the Trustee in accordance with this Agreement for the benefit of the Certificateholders by including (or deleting, in the case of Mortgage Loans that are repurchased in accordance with this Agreement) in such computer files the information required by the MERS® System to identify the series of the Certificates issued in connection with the transfer of such Mortgage Loans to the Thornburg Mortgage Securities Trust 2005-1.

With respect to each Cooperative Loan the Seller, on behalf of the Depositor does hereby deliver to the Trustee the related Cooperative Loan Documents and the Seller will take (or shall cause the applicable Servicer to take), at the expense of the Seller (with the cooperation of the Depositor, the Trustee and the Master Servicer) such actions as are necessary under applicable law (including but not limited to the relevant UCC) in order to perfect the interest of the Trustee in the related Mortgaged Property.

Assignments of each Mortgage with respect to each Mortgage Loan that is not a MERS Mortgage Loan (other than a Cooperative Loan) shall be recorded; provided, however , that such assignments need not be recorded if, in the Opinion of Counsel (which must be from Independent Counsel and not at the expense of the Trust or the Trustee) acceptable to the Trustee, the Rating Agency and the Master Servicer, recording in such states is not required to protect the Trust’s interest in the related Mortgage Loans; provided, however , notwithstanding the delivery of any Opinion of Counsel, each assignment of Mortgage shall be submitted for recording by the Seller (or the Seller will cause the applicable Servicer to submit each such assignment for recording), at the cost and expense of the Seller, in the manner described above, at no expense to the Trust or Trustee, upon the earliest to occur of (1) reasonable direction by the Majority Certificateholders, (2) the occurrence of a bankruptcy or insolvency relating to the Seller or the Depositor, or (3) with respect to any one Assignment of Mortgage, the occurrence of a bankruptcy, insolvency or foreclosure relating to the Mortgagor under the related Mortgage. Subject to the preceding sentence, as soon as practicable after the Closing Date (but in no event more than three months thereafter except to the extent delays are caused by the applicable recording office), the Seller shall properly record (or the Seller will cause the applicable Servicer to properly record), at the expense of the Seller (with the cooperation of the Depositor, the Trustee and the Master Servicer), in each public recording office where the related Mortgages are recorded, each assignment referred to in Section 2.01(v) above with respect to a Mortgage Loan that is not a MERS Mortgage Loan.

The Trustee agrees to execute and deliver to the Depositor on or prior to the Closing Date an acknowledgment of receipt of the original Mortgage Note (with any exceptions noted), substantially in the form attached as Exhibit G-1 hereto.

If the original lender’s title insurance policy, or a certified copy thereof, was not delivered pursuant to Section 2.01(viii) above, the Seller shall deliver or cause to be delivered to the Trustee the original or a copy of a written commitment or interim binder or preliminary report of title issued by the title insurance or escrow company, with the original or a certified copy thereof to be delivered to the Trustee, promptly upon receipt thereof, but in any case within 175 days of the Closing Date. The Seller shall deliver or cause to be delivered to the Trustee, promptly upon receipt thereof, any other documents constituting a part of a Mortgage File received with respect to any Mortgage Loan sold to the Depositor by the Seller, including, but not limited to, any original documents evidencing an assumption or modification of any Mortgage Loan.

For Mortgage Loans (if any) that have been prepaid in full after the Cut-off Date and prior to the Closing Date, the Seller, in lieu of delivering the above documents, herewith delivers to the Trustee, or to the 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 have been so deposited. All original documents that are not delivered to the Trustee on behalf of the Trust shall be held by the Master Servicer or the applicable Servicer in trust for the Trustee, for the benefit of the Trust and the Certificateholders.

Upon discovery or receipt of notice of any materially defective document in, or that a document is missing from, a Mortgage File, the Seller shall have 90 days to cure such defect or deliver such missing document to the Trustee. If the Seller does not cure such defect or deliver such missing document within such time period, the Seller shall either repurchase or substitute for such Mortgage Loan in accordance with Section 2.03 hereof.

The Depositor herewith delivers to the Trustee an executed copy of the Mortgage Loan Purchase Agreement.

SECTION 2.02. Acceptance by Trustee .

The Trustee hereby accepts its appointment as Custodian hereunder and acknowledges the receipt, subject to the provisions of Section 2.01 and subject to the review described below and any exceptions noted on the exception report described in the next paragraph below, of the documents referred to in Section 2.01 above and all other assets included in the definition of “Trust Fund” and declares that, in its capacity as Custodian, it holds and will hold such documents and the other documents delivered to it constituting a Mortgage File, and that it holds or will hold all such assets and such other assets included in the definition of “Trust Fund” in trust for the exclusive use and benefit of all present and future Certificateholders.

The Trustee further agrees, for the benefit of the Certificateholders, to review each Mortgage File delivered to it and to certify and deliver to the Depositor, the Seller and the Rating Agency an interim certification in substantially the form attached hereto as Exhibit G-2, within 90 days after the Closing Date (or, with respect to any document delivered after the Startup Day, within 45 days of receipt and with respect to any Qualified Substitute Mortgage, within five Business Days after the assignment thereof) that, as to each Mortgage Loan listed in the Mortgage Loan Schedule (other than any Mortgage Loan paid in full or any Mortgage Loan specifically identified in the exception report annexed thereto as not being covered by such certification), (i) all documents required to be delivered to it pursuant Section 2.01 of this Agreement are in its possession, (ii) such documents have been reviewed by it and have not been mutilated, damaged or torn and relate to such Mortgage Loan and (iii) based on its examination and only as to the foregoing, the information set forth in the Mortgage Loan Schedule that corresponds to items (i), (ii), (iii), (xiii), (xiv) and (xviii) of the Mortgage Loan Schedule accurately reflects information set forth in the Mortgage File. It is herein acknowledged that, in conducting such review, the Trustee is under no duty or obligation to inspect, review or examine any such documents, instruments, certificates or other papers to determine that they are genuine, enforceable, or appropriate for the represented purpose or that they have actually been recorded or that they are other than what they purport to be on their face.

No later than 180 days after the Closing Date, the Trustee shall deliver to the Depositor and the Seller a final certification in the form annexed hereto as Exhibit G-3 evidencing the completeness of the Mortgage Files, with any applicable exceptions noted thereon.

If, in the process of reviewing the Mortgage Files and making or preparing, as the case may be, the certifications referred to above, the Trustee finds any document or documents constituting a part of a Mortgage File to be missing or not conforming to the requirements set forth herein, at the conclusion of its review the Trustee (or the Custodian as its designated agent) shall promptly notify the Seller, the Depositor and the Master Servicer. In addition, upon the discovery by the Seller or the Depositor (or upon receipt by the Trustee of written notification of such breach) of a breach of any of the representations and warranties made by the Seller in the Mortgage Loan Purchase Agreement in respect of any Mortgage Loan that materially adversely affects such Mortgage Loan or the interests of the related Certificateholders in such Mortgage Loan, the party discovering such breach shall give prompt written notice to the other parties to this Agreement.

The Depositor and the Trustee intend that the assignment and transfer herein contemplated constitute a sale of the Mortgage Loans, the related Mortgage Notes and the related documents, conveying good title thereto free and clear of any liens and encumbrances, from the Depositor to the Trustee and that such property not be part of the Depositor’s estate or property of the Depositor in the event of any insolvency by the Depositor. In the event that such conveyance is deemed to be, or to be made as security for, a loan, the parties intend that the Depositor shall be deemed to have granted and does hereby grant to the Trustee a first priority perfected security interest in all of the Depositor’s right, title and interest in and to the Mortgage Loans, the related Mortgage Notes and the related documents, and that this Agreement shall constitute a security agreement under applicable law.

SECTION 2.03. Repurchase or Substitution of Mortgage Loans by the Seller .

(a)

Upon discovery or receipt of written notice that a document does not comply with the requirement of Section 2.01 hereof, or that a document is missing from, a Mortgage File or of the breach by the Seller of any representation, warranty or covenant under the Mortgage Loan Purchase Agreement or in Section 2.04 or Section 2.08 hereof in respect of any Mortgage Loan which materially adversely affects the value of that Mortgage Loan or the interest therein of the Certificateholders, the Trustee (or the Custodian as its designated agent) shall promptly notify the Seller of such noncompliance, missing document or breach and request that the Seller deliver such missing document or cure such noncompliance or breach within 90 days from the date that the Seller was notified of such missing document, noncompliance or breach, and if the Seller does not deliver such missing document or cure such noncompliance or breach in all material respects during such period, the Trustee shall enforce the Seller’s obligation under the Mortgage Loan Purchase Agreement and cause the Seller 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 90 day period (subject to Section 2.03(e) below); provided, however , that, in connection with any such breach that could not reasonably have been cured within such 90 day period, if the Seller shall have commenced to cure such breach within such 90 day period, the Seller shall be permitted to proceed thereafter diligently and expeditiously to cure the same within the additional period provided under the Mortgage Loan Purchase Agreement; and, provided further , that, in the case of the breach of any representation, warranty or covenant made by the Seller in Schedule III to the Mortgage Loan Purchase Agreement, the Seller shall be obligated to cure such breach or purchase the affected Mortgage Loans for the Purchase Price or, if the Mortgage Loan or the related Mortgaged Property acquired with respect thereto has been sold, then the Seller shall pay, in lieu of the Purchase Price, any excess of the Purchase Price over the Net Liquidation Proceeds received upon such sale. The Purchase Price for the repurchased Mortgage Loan or such other amount due shall be deposited in the Collection Account on or prior to the next Determination Date after the Seller’s obligation to repurchase such Mortgage Loan arises. The Trustee, upon receipt of written certification from the Master Servicer of the related deposit in the Collection Account, shall release to the Seller the related Mortgage File and shall execute and deliver such instruments of transfer or assignment, in each case without recourse, as the Seller shall furnish to it and as shall be necessary to vest in the Seller any Mortgage Loan released pursuant hereto and the Trustee shall have no further responsibility with regard to such Mortgage File (it being understood that the Trustee shall have no responsibility for determining the sufficiency of such assignment for its intended purpose). In lieu of repurchasing any such Mortgage Loan as provided above, the Seller 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 Qualified Substitute Mortgage Loans in the manner and subject to the limitations set forth in Section 2.03(d) below. It is understood and agreed that the obligation of the Seller to cure or to repurchase (or to substitute for) any 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 Seller respecting such omission, defect or breach available to the Trustee on behalf of the Certificateholders.

The Trustee shall enforce the obligations of the Seller under the Mortgage Loan Purchase Agreement including, without limitation, any obligation of the Seller to purchase a Mortgage Loan on account of missing or defective documentation or on account of a breach of a representation, warranty or covenant as described in this Section 2.03(a).

(b)

If pursuant to the provisions of Section 2.03(a), the Seller repurchases or otherwise removes from the Trust Fund a Mortgage Loan that is a MERS Mortgage Loan, the Seller will take (or shall cause the applicable Servicer to take), at the expense of the Seller (with the cooperation of the Depositor, the Trustee and the Master Servicer), such actions as are necessary either (i) cause MERS to execute and deliver an Assignment of Mortgage in recordable form to transfer the Mortgage from MERS to the Seller and shall cause such Mortgage to be removed from registration on the MERS® System in accordance with MERS’ rules and regulations or (ii) cause MERS to designate on the MERS® System the Seller or its designee as the beneficial holder of such Mortgage Loan.

(c)

[Reserved].

(d)

Any substitution of Qualified Substitute Mortgage Loans for Deleted Mortgage Loans made pursuant to Section 2.03(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 Seller substitutes a Qualified Substitute Mortgage Loan or Loans, such substitution shall be effected by the Seller delivering to the Trustee, for such Qualified Substitute 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, as are required by Section 2.01 hereof, together with an Officers’ Certificate stating that each such Qualified Substitute Mortgage Loan satisfies the definition thereof and specifying the Substitution Adjustment (as described below), if any, in connection with such substitution; provided, however , that, in the case of any Qualified Substitute Mortgage Loan that is a MERS Mortgage Loan, the Seller shall provide such documents and take such other action with respect to such Qualified Substitute Mortgage Loans as are required pursuant to Section 2.01 hereof. The Trustee shall acknowledge receipt for such Qualified Substitute Mortgage Loan or Loans and, within five Business Days thereafter, shall review such documents as specified in Section 2.02 hereof and deliver to the related Servicer, with respect to such Qualified Substitute Mortgage Loan or Loans, a certification substantially in the form attached hereto as Exhibit G-2, with any exceptions noted thereon. Within 180 days of the date of substitution, the Trustee shall deliver to the Seller and the Master Servicer a certification substantially in the form of Exhibit G-3 hereto with respect to such Qualified Substitute Mortgage Loan or Loans, with any exceptions noted thereon. Monthly Payments due with respect to Qualified Substitute Mortgage Loans in the month of substitution are not part of the Trust Fund and will be retained by the Seller. For the month of substitution, distributions to Certificateholders will reflect the collections and recoveries in respect of such Deleted Mortgage Loan in the Due Period preceding the month of substitution and the Depositor or the Seller, as the case may be, shall thereafter be entitled to retain all amounts subsequently received in respect of such Deleted Mortgage Loan. The Seller shall give or cause to be given written notice to the Certificateholders that such substitution has taken place, shall amend the Mortgage Loan Schedule to reflect the removal of such Deleted Mortgage Loan from the terms of this Agreement and the substitution of the Qualified Substitute Mortgage Loan or Loans and shall deliver a copy of such amended Mortgage Loan Schedule to the Trustee. Upon such substitution, such Qualified Substitute Mortgage Loan or Loans shall constitute part of the Trust Fund and shall be subject in all respects to the terms of this Agreement and, in the case of a substitution effected by the Seller, the Mortgage Loan Purchase Agreement, including, in the case of a substitution effected by the Seller all representations and warranties thereof included in the Mortgage Loan Purchase Agreement and all representations and warranties thereof set forth in Section 2.04 hereof, in each case as of the date of substitution.

For any month in which the Seller substitutes one or more Qualified Substitute Mortgage Loans for one or more Deleted Mortgage Loans, the Seller shall determine, and provide written certification to the Trustee and the Seller as to, the amount (each, a “Substitution Adjustment”), if any, by which the aggregate Purchase Price of all such Deleted Mortgage Loans exceeds the aggregate, as to each such Qualified Substitute Mortgage Loan, of the principal balance thereof as of the date of substitution, together with one month’s interest on such principal balance at the applicable Net Loan Rate. On or prior to the next Determination Date after the Seller’s obligation to repurchase the related Deleted Mortgage Loan arises, the Seller will deliver or cause to be delivered to the Trustee for deposit in the Distribution Account an amount equal to the related Substitution Adjustment, if any, and the Trustee, upon receipt of the related Qualified Substitute Mortgage Loan or Loans, shall release to the Seller the related Mortgage File or Files and shall execute and deliver such instruments of transfer or assignment, in each case without recourse, as the Seller shall deliver to it and as shall be necessary to vest therein any Deleted Mortgage Loan released pursuant hereto.

In addition, the Seller shall obtain at its own expense and deliver to the Trustee an Opinion of Counsel to the effect that such substitution (either specifically or as a class of transactions) will not cause (a) any federal tax to be imposed on the Trust Fund, including without limitation, any federal tax imposed on “prohibited transactions” under Section 860F(a)(l) of the Code or on “contributions after the startup date” under Section 860G(d)(l) of the Code, or (b) any REMIC created hereunder to fail to qualify as a REMIC at any time that any Certificate is outstanding. If such Opinion of Counsel cannot be delivered, then such substitution may only be effected at such time as the required Opinion of Counsel can be given.

(e)

Upon discovery by the Seller 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 Business Days give written notice thereof to the other parties. In connection therewith, the Seller shall repurchase or, subject to the limitations set forth in Section 2.03(d), substitute one or more Qualified Substitute 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 2.03(a) above, if made by the Seller. The Trustee shall reconvey to the Seller 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.

SECTION 2.04. Representations and Warranties of the Seller with Respect to the
Mortgage Loans.

The Seller hereby represents and warrants to the Trustee for the benefit of the Certificateholders that the representations and warranties made by the Seller pursuant to Schedule III to the Mortgage Loan Purchase Agreement are hereby being made to the Trustee and are true and correct as of the Closing Date.

With respect to the representations and warranties incorporated in this Section 2.04 that are made to the best of the Seller’s knowledge or as to which the Seller has no knowledge, if it is discovered by the Depositor, the Seller or the Trustee that the substance of such representation and warranty is inaccurate and such inaccuracy materially and adversely affects the value of the related Mortgage Loan or the interest therein of the Certificateholders then, notwithstanding the Seller’s lack of knowledge with respect to the substance of such representation and warranty being inaccurate at the time the representation or warranty was made, such inaccuracy shall be deemed a breach of the applicable representation or warranty.

Within 90 days of its discovery or its receipt of notice of any such missing or materially defective documentation or any such breach of a representation or warranty, the Seller shall promptly deliver such missing document or cure such defect or breach in all material respects or, in the event such defect or breach cannot be cured, the Seller shall repurchase the affected Mortgage Loan or cause the removal of such Mortgage Loan from the Trust Fund and substitute for it one or more Qualified Substitute Mortgage Loans, in either case, in accordance with Section 2.03 hereof.

It is understood and agreed that the representations and warranties incorporated in this Section 2.04 shall survive delivery of the Mortgage Files to the Trustee and shall inure to the benefit of the Certificateholders notwithstanding any restrictive or qualified endorsement or assignment. Upon discovery by any of the Depositor, the Seller or the Trustee of a breach of any of the foregoing representations and warranties which materially and adversely affects the value of any Mortgage Loan or the interests therein of the Certificateholders, the party discovering such breach shall give prompt written notice to the other parties, and in no event later than two Business Days from the date of such discovery. It is understood and agreed that the obligations of the Seller set forth in Section 2.03(a) hereof to cure, substitute for or repurchase a related Mortgage Loan pursuant to the Mortgage Loan Purchase Agreement constitute the sole remedies available to the Certificateholders or to the Trustee on their behalf respecting a breach of the representations and warranties incorporated in this Section 2.04.

SECTION 2.05. [ Reserved ].

SECTION 2.06. Representations and Warranties of the Depositor .

The Depositor represents and warrants to the Trust and the Trustee on behalf of the Certificateholders as follows:

(i)

this agreement constitutes a legal, valid and binding obligation of the Depositor, enforceable against the Depositor in accordance with its terms, except as enforceability may be limited by applicable bankruptcy, insolvency, reorganization, moratorium or other similar laws now or hereafter in effect affecting the enforcement of creditors’ rights in general an except as such enforceability may be limited by general principles of equity (whether considered in a proceeding at law or in equity);

(ii)

immediately prior to the sale and assignment by the Depositor to the Trustee on behalf of the Trust of each Mortgage Loan, the Depositor had good and marketable title to each Mortgage Loan (insofar as such title was conveyed to it by the Seller) subject to no prior lien, claim, participation interest, mortgage, security interest, pledge, charge or other encumbrance or other interest of any nature;

(iii)

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;

(iv)

the Depositor has not transferred the Mortgage Loans to the Trustee on behalf of the Trust with any intent to hinder, delay or defraud any of its creditors;

(v)

the Depositor has been duly incorporated and is validly existing as a corporation in good standing under the laws of Delaware, with full corporate power and authority to own its assets and conduct its business as presently being conducted;

(vi)

the Depositor is not in violation of its certificate of incorporation or by-laws or in default in the performance or observance of any material obligation, agreement, covenant or condition contained in any contract, indenture, mortgage, loan agreement, note, lease or other instrument to which the Depositor is a party or by which it or its properties may be bound, which default might result in any material adverse changes in the financial condition, earnings, affairs or business of the Depositor or which might materially and adversely affect the properties or assets, taken as a whole, of the Depositor;

(vii)

the execution, delivery and performance of this Agreement by the Depositor, and the consummation of the transactions contemplated hereby, do not and will not result in a material breach or violation of any of the terms or provisions of, or, to the knowledge of the Depositor, constitute a default under, any indenture, mortgage, deed of trust, loan agreement or other agreement or instrument to which the Depositor is a party or by which the Depositor is bound or to which any of the property or assets of the Depositor is subject, nor will such actions result in any violation of the provisions of the certificate of incorporation or by-laws of the Depositor or, to the best of the Depositor’s knowledge without independent investigation, any statute or any order, rule or regulation of any court or governmental agency or body having jurisdiction over the Depositor or any of its properties or assets (except for such conflicts, breaches, violations and defaults as would not have a material adverse effect on the ability of the Depositor to perform its obligations under this Agreement);

(viii)

to the best of the Depositor’s knowledge without any independent investigation, no consent, approval, authorization, order, registration or qualification of or with any court or governmental agency or body of the United States or any other jurisdiction is required for the issuance of the Certificates, or the consummation by the Depositor of the other transactions contemplated by this Agreement, except such consents, approvals, authorizations, registrations or qualifications as (a) may be required under State securities or “blue sky” laws, (b) have been previously obtained or (c) the failure of which to obtain would not have a material adverse effect on the performance by the Depositor of its obligations under, or the validity or enforceability of, this Agreement; and

(ix)

there are no actions, proceedings or investigations pending before or, to the Depositor’s knowledge, threatened by any court, administrative agency or other tribunal to which the Depositor is a party or of which any of its properties is the subject: (a) which if determined adversely to the Depositor would have a material adverse effect on the business, results of operations or financial condition of the Depositor; (b) asserting the invalidity of this Agreement or the Certificates; (c) seeking to prevent the issuance of the Certificates or the consummation by the Depositor of any of the transactions contemplated by this Agreement, as the case may be; or (d) which might materially and adversely affect the performance by the Depositor of its obligations under, or the validity or enforceability of, this Agreement.

SECTION 2.07. Issuance of Certificates .

The Trustee acknowledges the assignment to it of the Mortgage Loans and the delivery to it of the Mortgage Files, subject to the provisions of Sections 2.01 and 2.02 hereof, together with the assignment to it of all other assets included in the Trust Fund, receipt of which is hereby acknowledged. Concurrently with such assignment and delivery and in exchange therefor, the Trustee, pursuant to the written request of the Depositor executed by an officer of the Depositor, has executed, authenticated and delivered to or upon the order of the Depositor, the Certificates in authorized denominations. The interests evidenced by the Certificates constitute the entire beneficial ownership interest in the Trust Fund.

SECTION 2.08. Representations and Warranties of the Seller .

The Seller hereby represents and warrants to the Trust and the Trustee on behalf of the Certificateholders that, as of the Closing Date or as of such date specifically provided herein:

(i)

the Seller is duly organized, validly existing and in good standing as a corporation under the laws of the State of Delaware and is and will remain in compliance with the laws of each state in which any Mortgaged Property is located to the extent necessary to fulfill its obligations hereunder;

(ii)

the Seller has the power and authority to hold each Mortgage Loan, to sell each Mortgage Loan, to execute, deliver and perform, and to enter into and consummate, all transactions contemplated by this Agreement. The Seller has duly authorized the execution, delivery and performance of this Agreement, has duly executed and delivered this Agreement and this Agreement, assuming due authorization, execution and delivery by the other parties hereto, constitutes a legal, valid and binding obligation of the Seller, enforceable against it in accordance with its terms except as the enforceability thereof may be limited by bankruptcy, insolvency or reorganization or other similar laws in relation to the rights of creditors generally;

(iii)

the execution and delivery of this Agreement by the Seller and the performance of and compliance with the terms of this Agreement will not violate the Seller’s articles of incorporation or by-laws or constitute a default under or result in a material breach or acceleration of, any material contract, agreement or other instrument to which the Seller is a party or which may be applicable to the Seller or its assets;

(iv)

the Seller is not in violation of, and the execution and delivery of this Agreement by the Seller and its performance and compliance with the terms of this Agreement will not constitute a violation with respect to, any order or decree of any court or any order or regulation of any federal, state, municipal or governmental agency having jurisdiction over the Seller or its assets, which violation might have consequences that would materially and adversely affect the condition (financial or otherwise) or the operation of the Seller or its assets or might have consequences that would materially and adversely affect the performance of its obligations and duties hereunder;

(v)

the Seller does not believe, nor does it have any reason or cause to believe, that it cannot perform each and every covenant contained in this Agreement;

(vi)

the Seller has good, marketable and indefeasible title to the Mortgage Loans, free and clear of any and all liens, pledges, charges or security interests of any nature encumbering the Mortgage Loans and upon the payment of the purchase price under the Mortgage Loan Purchase Agreement by the Depositor, the Depositor will have good and marketable title to the Mortgage Notes and Mortgage Loans, free and clear of all liens or encumbrances;

(vii)

the Mortgage Loans are not being transferred by the Seller with any intent to hinder, delay or defraud any creditors of the Seller;

(viii)

there are no actions or proceedings against, or investigations known to it of, the Seller before any court, administrative or other tribunal (A) that might prohibit its entering into this Agreement, (B) seeking to prevent the sale of the Mortgage Loans or the consummation of the transactions contemplated by this Agreement or (C) that might prohibit or materially and adversely affect the performance by the Seller of its obligations under, or validity or enforceability of, this Agreement;

(ix)

no consent, approval, authorization or order of any court or governmental agency or body is required for the execution, delivery and performance by the Seller of, or compliance by the Seller with, this Agreement or the consummation of the transactions contemplated by this Agreement, except for such consents, approvals, authorizations or orders, if any, that have been obtained; and

(x)

the consummation of the transactions contemplated by this Agreement are in the ordinary course of business of the Seller, and the transfer, assignment and conveyance of the Mortgage Notes and the Mortgages by the Seller pursuant to the Mortgage Loan Purchase Agreement are not subject to the bulk transfer or any similar statutory provisions.

SECTION 2.09. Covenants of the Seller .

The Seller hereby covenants that, except for the transfer hereunder, the Seller will not sell, pledge, assign or transfer to any other Person, or grant, create, incur, assume or suffer to exist any lien on any Mortgage Loan, or any interest therein; the Seller will notify the Trustee, as assignee of the Depositor, and the Master Servicer of the existence of any lien on any Mortgage Loan immediately upon discovery thereof, and the Seller will defend the right, title and interest of the Trust, as assignee of the Depositor, in, to and under the Mortgage Loans, against all claims of third parties claiming through or under the Seller; provided, however, that nothing in this Section 2.09 shall prevent or be deemed to prohibit the Seller from suffering to exist upon any of the Mortgage Loans any liens for municipal or other local taxes and other governmental charges if such taxes or governmental charges shall not at the time be due and payable or if the Seller shall currently be contesting the validity thereof in good faith by appropriate proceedings and shall have set aside on its books adequate reserves with respect thereto.

ARTICLE III

AD MINISTRATION AND SERVICING
OF THE MORTGAGE LOANS

SECTION 3.01. Master Servicer to Service and Administer the Mortgage Loans .

The Master Servicer shall supervise, monitor and oversee the obligation of the Servicers to service and administer their respective Mortgage Loans in accordance with the terms of the applicable Servicing Agreement and, where applicable, the Correspondent Sellers Guide and the Master Servicing Guide, and shall have full power and authority to do any and all things which it may deem necessary or desirable in connection with such master servicing and administration. In performing its obligations hereunder, the Master Servicer shall act in a manner consistent with Accepted Master Servicing Practices and, where applicable, the Master Servicing Guide. Furthermore, the Master Servicer shall oversee and consult with each Servicer as necessary from time-to-time to carry out the Master Servicer’s obligations hereunder, shall receive, review and evaluate all reports, information and other data provided to the Master Servicer by each Servicer and shall cause each Servicer to perform and observe the covenants, obligations and conditions to be performed or observed by such Servicer under the applicable Servicing Agreement. The Master Servicer shall independently and separately monitor each Servicer’s servicing activities with respect to each related Mortgage Loan, reconcile the results of such monitoring with such information provided in the previous sentence on a monthly basis and coordinate corrective adjustments to the Servicers’ and Master Servicer’s records, and based on such reconciled and corrected information, prepare the statements specified in Section 5.04 and any other information and statements required hereunder. The Master Servicer shall reconcile the results of its Mortgage Loan monitoring with the actual remittances of the Servicers to the related Servicing Accounts pursuant to the applicable Servicing Agreements.

The Trustee shall furnish the Servicers and the Master Servicer with any limited powers of attorney and other documents in form acceptable to the Trustee, necessary or appropriate to enable the Servicers and the Master Servicer to service and administer the related Mortgage Loans and REO Property, which limited powers of attorney shall provide that the Trustee will not be liable for the actions or omissions of the Servicers or Master Servicer in exercising such powers.

The Trustee shall provide access to the records and documentation in possession of the Trustee (including in its capacity as Custodian hereunder) regarding the related Mortgage Loans and REO Property and the servicing thereof to the Certificateholders, the FDIC, and the supervisory agents and examiners of the FDIC, such access being afforded only upon reasonable prior written request and during normal business hours at the office of the Trustee; provided, however, that, unless otherwise required by law, the Trustee shall not be required to provide access to such records and documentation if the provision thereof would violate the legal right to privacy of any Mortgagor. The Trustee shall allow representatives of the above entities to photocopy any of the records and documentation and shall provide equipment for that purpose at a charge that covers the Trustee’s actual costs.

The Trustee shall execute and deliver to the related Servicer and the Master Servicer any court pleadings, requests for trustee’s sale or other documents necessary or desirable to (i) the foreclosure or trustee’s sale with respect to a Mortgaged Property; (ii) any legal action brought to obtain judgment against any Mortgagor on the Mortgage Note or Mortgage; (iii) obtain a deficiency judgment against the Mortgagor; or (iv) enforce any other rights or remedies provided by the Mortgage Note or Mortgage or otherwise available at law or equity.

SECTION 3.02. REMIC-Related Covenants .

For as long as each REMIC created hereunder shall exist, the Trustee and the Securities Administrator shall act in accordance herewith to assure continuing treatment of each such REMIC as a REMIC, and the Trustee and the Securities Administrator shall comply with any directions of the Depositor, the related Servicer or the Master Servicer to assure such continuing treatment. In particular, the Trustee shall not (a) sell or permit the sale of all or any portion of the Mortgage Loans or of any investment of deposits in an Account unless such sale is as a result of a repurchase of the Mortgage Loans pursuant to this Agreement or the Trustee has received a REMIC Opinion prepared at the expense of the Trust; and (b) other than with respect to a substitution pursuant to the Mortgage Loan Purchase Agreement or Section 2.03 or 2.04 of this Agreement, as applicable, accept any contribution to any REMIC after the Startup Day without receipt of a REMIC Opinion.

SECTION 3.03. Monitoring of Servicers .

(a)

The Master Servicer shall be responsible for reporting to the Trustee (on behalf of the Trust) and the Depositor the compliance by each Servicer with its duties under the related Servicing Agreement. In the review of each Servicer’s activities, the Master Servicer may rely upon an officer’s certificate of the Servicer with regard to such Servicer’s compliance with the terms of its Servicing Agreement. In the event that the Master Servicer, in its judgment, determines that a Servicer should be terminated in accordance with its Servicing Agreement, or that a notice should be sent pursuant to such Servicing Agreement with respect to the occurrence of an event that, unless cured, would constitute grounds for such termination, the Master Servicer shall notify the Depositor and the Trustee thereof and the Master Servicer shall issue such notice or take such other action as it deems appropriate.

(b)

The Master Servicer, for the benefit of the Trust and the Certificateholders, shall (acting as agent of the Trust when enforcing the Trust’s rights under each Servicing Agreement) (i) enforce the obligations of each Servicer under the related Servicing Agreement, and (ii) in the event that a Servicer fails to perform its obligations in accordance with the related Servicing Agreement, subject to the preceding paragraph, terminate the rights and obligations of such Servicer thereunder and act as servicer of the related Mortgage Loans or enter into a new Servicing Agreement with a successor Servicer selected by the Master Servicer which the Master Servicer shall cause the Trustee to acknowledge; provided, however , it is understood and acknowledged by the parties hereto that there will be a period of transition (not to exceed 90 days) before the actual servicing functions can be fully transferred to such successor Servicer. Such enforcement, including, without limitation, the legal prosecution of claims, termination of Servicing Agreements and the pursuit of other appropriate remedies, shall be in such form and carried out to such an extent and at such time as the Master Servicer, in its good faith business judgment, would require were it the owner of the related Mortgage Loans. The Master Servicer shall pay the costs of such enforcement at its own expense, provided that the Master Servicer shall not be required to prosecute or defend any legal action except to the extent that the Master Servicer shall have received reasonable indemnity for its costs and expenses in pursuing such action.

(c)

To the extent that the costs and expenses of the Master Servicer related to any termination of a Servicer, appointment of a successor Servicer or the transfer and assumption of servicing by the Master Servicer with respect to any Servicing Agreement (including, without limitation, (i) all legal costs and expenses and all due diligence costs and expenses associated with an evaluation of the potential termination of the Servicer as a result of an event of default by such Servicer and (ii) all costs and expenses associated with the complete transfer of servicing, including all servicing files and all servicing data and the completion, correction or manipulation of such servicing data as may be required by the successor servicer to correct any errors or insufficiencies in the servicing data or otherwise to enable the successor servicer to service the Mortgage Loans in accordance with the related Servicing Agreement) are not fully and timely reimbursed by the terminated Servicer, the Master Servicer shall be entitled to reimbursement of such costs and expenses from the Collection Account.

(d)

The Master Servicer shall require each Servicer to comply with the remittance requirements and other obligations set forth in the related Servicing Agreement.

(e)

If the Master Servicer acts as Servicer, it will not assume liability for the representations and warranties of the Servicer, if any, that it replaces.

(f)

With respect to Additional Collateral Mortgage Loans, the Master Servicer shall have no duty or obligation to supervise, monitor or oversee the activities of each Servicer under its Servicing Agreement with respect to Additional Collateral, except (a) with respect to any instances where a Servicer, in the course of fulfilling its obligations under the related Servicing Agreement seeks directions, instructions, consents or waivers from the Master Servicer with respect to any item of Additional Collateral, or (b) upon the occurrence of the following events (i) in the case of a final liquidation of any Mortgaged Property secured by Additional Collateral, the Master Servicer shall enforce the obligation of the Servicer under the related Servicing Agreement to liquidate such Additional Collateral as required by such Servicing Agreement, and (ii) if the Master Servicer assumes the obligations of such Servicer as successor Servicer under the related Servicing Agreement pursuant to this Section 3.03, as successor Servicer, it shall be bound to service and administer the Additional Collateral in accordance with the provisions of such Servicing Agreement.

SECTION 3.04. Fidelity Bond .

The Master Servicer, at its expense, shall maintain in effect a blanket fidelity bond and an errors and omissions insurance policy, affording coverage with respect to all directors, officers, employees and other Persons acting on such Master Servicer’s behalf, and covering errors and omissions in the performance of the Master Servicer’s obligations hereunder. The errors and omissions insurance policy and the fidelity bond shall be in such form and amount generally acceptable for entities serving as master servicers or trustees.

SECTION 3.05. Power to Act; Procedures .

The Master Servicer shall master service the Mortgage Loans and shall have full power and authority, subject to the REMIC Provisions and the provisions of Article X hereof, to do any and all things that it may deem necessary or desirable in connection with the master servicing and administration of the Mortgage Loans, including but not limited to the power and authority (i) to execute and deliver, on behalf of the Certificateholders, the Trust and the Trustee, customary consents or waivers and other instruments and documents, (ii) to consent to transfers of any Mortgaged Property and assumptions of the Mortgage Notes and related Mortgages, (iii) to collect any Insurance Proceeds, Liquidation Proceeds and Recoveries and (iv) to effectuate, in its own name, on behalf the Trust, or in the name of the Trust, foreclosure or other conversion of the ownership of the Mortgaged Property securing any Mortgage Loan, in each case, in accordance with the provisions of this Agreement and the related Servicing Agreement, as applicable; provided, however , that the Master Servicer shall not (and, consistent with its responsibilities under Section 3.03, shall not permit any Servicer to) knowingly or intentionally take any action, or fail to take (or fail to cause to be taken) any action reasonably within its control and the scope of duties more specifically set forth herein, that, under the REMIC Provisions, if taken or not taken, as the case may be, would result in an Adverse REMIC Event unless the Master Servicer has received an Opinion of Counsel (but not at the expense of the Master Servicer) to the effect that the contemplated action will not result in an Adverse REMIC Event. The Trustee shall furnish the Master Servicer, upon written request from a Servicing Officer, with any limited powers of attorney empowering the Master Servicer or any Servicer to execute and deliver instruments of satisfaction or cancellation, or of partial or full release or discharge, and to foreclose upon or otherwise liquidate Mortgaged Property, and to appeal, prosecute or defend in any court action relating to the Mortgage Loans or the Mortgaged Property, in accordance with the applicable Servicing Agreement and this Agreement, and the Trustee shall execute and deliver such other documents, as the Master Servicer may request, to enable the Master Servicer to master service and administer the Mortgage Loans and carry out its duties hereunder, in each case in accordance with Accepted Master Servicing Practices (and the Trustee shall have no liability for misuse of any such powers of attorney by the Master Servicer or any Servicer). In instituting foreclosures or similar proceedings, the Master Servicer shall institute such proceedings either in its own name on behalf of the Trust or in the name of the Trust (or cause the related Servicer, pursuant to the related Servicing Agreement, to institute such proceedings either in the name of such Servicer on behalf of the Trust or in the name of the Trust), unless otherwise required by law or otherwise appropriate. If the Master Servicer or the Trustee has been advised that it is likely that the laws of the state in which action is to be taken prohibit such action if taken in the name of the Trust or the Trustee on its behalf or that the Trust or the Trustee, as applicable, would be adversely affected under the “doing business” or tax laws of such state if such action is taken in its name, the Master Servicer sha

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