GREENWICH CAPITAL ACCEPTANCE, INC.,

as Purchaser

and

GREENWICH CAPITAL FINANCIAL PRODUCTS, INC.,

as Seller

MORTGAGE LOAN PURCHASE AGREEMENT

Dated as of May 1, 2007

Adjustable-Rate Mortgage Loans

HARBORVIEW MORTGAGE LOAN TRUST

Mortgage Loan Pass-Through Certificates, Series 2007-4

Table of Contents

UPage

ARTICLE I DEFINITIONS AND SCHEDULES		1
Section 1.01.	UDefinitionsU	1
ARTICLE II SALE OF MORTGAGE LOANS; PAYMENT OF PURCHASE PRICE		2
Section 2.01.	USale of Mortgage Loans; Assignment of the Servicing AgreementsU	2
Section 2.02.	UObligations of the Seller Upon Sale and AssignmentU	3
Section 2.03.	UPayment of Purchase Price for the Mortgage LoansU	3
ARTICLE III REPRESENTATIONS AND WARRANTIES; REMEDIES FOR BREACH		4
Section 3.01.	[Reserved]	4
Section 3.02.	USeller’s Representations and WarrantiesU	4
Section 3.03.	URemedies for Breach of Representations and WarrantiesU	5
ARTICLE IV SELLER’S COVENANTS		6
Section 4.01.	UCovenants of the SellerU	6
ARTICLE V [RESERVED]		6
ARTICLE VI TERMINATION		6
Section 6.01.	UTerminationU	6
ARTICLE VII MISCELLANEOUS PROVISIONS		6
Section 7.01.	UAmendmentU	6
Section 7.02.	UGoverning LawU	6
Section 7.03.	UNoticesU	6
Section 7.04.	USeverability of ProvisionsU	7
Section 7.05.	UCounterpartsU	7
Section 7.06.	UFurther AgreementsU	7
Section 7.07.	UIntention of the PartiesU	7
Section 7.08.	USuccessors and Assigns: Assignment of Purchase AgreementU	8
Section 7.09.	USurvivalU	8
Section 7.10.	[Reserved]	8

USchedule IU:	Mortgage Loan Schedule
USchedule IIU:	List of Servicing Agreements

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This MORTGAGE LOAN PURCHASE AGREEMENT dated as of May 1, 2007 (the “Agreement”), is made and entered into between Greenwich Capital Financial Products, Inc. (the “Seller” or “GCFP”) and Greenwich Capital Acceptance, Inc. (“GCA” or the “Purchaser”).

WITNESSETH

WHEREAS, the Seller is the owner of the notes or other evidence of indebtedness (the “Mortgage Notes”) so indicated on Schedule I hereto, and the other documents or instruments constituting the Mortgage File (collectively, the “Mortgage Loans”); and

WHEREAS, the Seller is a party to the servicing agreements identified on Schedule II hereto (the “Servicing Agreements”) pursuant to which the Mortgage Loans are to be serviced by the respective servicer identified therein (the “Servicer”):

WHEREAS, the Seller, as of the date hereof, owns the mortgages or deeds of trust (the “Mortgages”) on the properties (the “Mortgaged Properties”) securing such Mortgage Loans, including rights to (a) any property acquired by foreclosure or deed in lieu of foreclosure or otherwise and (b) the proceeds of any insurance policies covering the Mortgage Loans or the Mortgaged Properties or the obligors on the Mortgage Loans; and

WHEREAS, the parties hereto desire that the Seller sell the Mortgage Loans, including the Mortgages, and assign the Seller’s rights under the Servicing Agreements to the Purchaser pursuant to the terms of this Agreement; and

WHEREAS, pursuant to the terms of that certain Pooling and Servicing Agreement dated as of May 1, 2007 (the “Pooling and Servicing Agreement”), among the Purchaser, as depositor, the Seller, Wells Fargo Bank, N.A., as master servicer (the “Master Servicer”) and securities administrator (the “Securities Administrator”), Deutsche Bank National Trust Company, as trustee (the “Trustee”) and as a custodian and Clayton Fixed Income Services Inc., as credit risk manager, the Purchaser will convey the Mortgage Loans to the Trustee.

NOW, THEREFORE, in consideration of the mutual covenants herein contained, the parties hereto agree as follows:

ARTICLE I

DEFINITIONS AND SCHEDULES

Section 1.01.UDefinitionsU.

“Servicer”: Each of GMAC Mortgage, LLC (“GMACM”), SunTrust Mortgage, Inc., Lydian Private Bank, Countrywide Home Loans Servicing LP, U.S. Central Federal Credit Union, Mellon Trust of New England, National Association (f/k/a Boston Safe Deposit and Trust Company) and Central Mortgage Company, each in its respective capacity as Servicer of the Mortgage Loans.

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“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 Servicing Agreements.

“Servicing Rights”: With respect to any Mortgage Loan serviced by GMACM, any and all of the following: (a) the right, under the related Servicing Agreement, to terminate GMACM as servicer of the Mortgage Loan, with or without cause, (b) the right, under the related Servicing Agreement, to transfer the Servicing Rights and/or all servicing obligations with respect to such Mortgage Loan; (c) the right to the related Servicing Fee, less an amount to be retained by GMACM, as its servicing compensation as agreed to by the Servicing Rights Owner and GMACM and (d) all powers and privileges incident to any of the foregoing.

Any capitalized term used but not defined herein and below shall have the meaning assigned thereto in the Pooling and Servicing Agreement or the Prospectus Supplement dated June 13, 2007 (the “Prospectus Supplement”), as applicable.

ARTICLE II

SALE OF MORTGAGE LOANS; PAYMENT OF PURCHASE PRICE

Section 2.01.USale of Mortgage Loans; Assignment of the Servicing AgreementsU. The Seller, concurrently with the execution and delivery of this Agreement, does hereby sell, assign, set over, and otherwise convey to the Purchaser, without recourse, all of its right, title and interest in, to and under (i) each Mortgage Loan, including the 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 (and all principal received before the Cut-off Date to the extent such principal relates to a Monthly Payment due after the Cut-off Date) (other than the Servicing Rights with respect to the SRO Mortgage Loans (each as defined in the Pooling and Servicing Agreement); (ii) property which secured such Mortgage Loan and which has been acquired by foreclosure or deed in lieu of foreclosure; (iii) its interest in any insurance policies in respect of the Mortgage Loans and (iv) all proceeds of any of the foregoing.

Concurrently with the execution and delivery of this Agreement, the Seller hereby assigns to the Purchaser all of its rights and interest (but none of its obligations) under the Servicing Agreements to the extent relating to the Mortgage Loans (other than the Servicing Rights with respect to the SRO Mortgage Loans). The Purchaser hereby accepts such assignment, and shall be entitled to exercise all such rights of the Seller under the Servicing Agreements as if the Purchaser had been a party to such agreement.

Section 2.02.UObligations of the Seller Upon Sale and AssignmentU. In connection with the transfer pursuant to Section 2.01 hereof, the Seller further agrees, at its own expense, on or prior to the Closing Date, (a) to indicate in its books and records that the Mortgage Loans have been sold to the Purchaser pursuant to this Agreement and (b) to deliver to the Purchaser and the Trustee a computer file containing a true and complete list of all such Mortgage Loans specifying for each such Mortgage Loan the information required to be set forth on the Mortgage Loan Schedule and such file, which forms a part of Schedule A to the Pooling and Servicing Agreement, shall also be marked as Schedule I to this Agreement and is hereby incorporated into and made a part of this Agreement.

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In connection with such conveyance by the Seller, the Seller shall on behalf of the Purchaser deliver to, and deposit with the Trustee (or a custodian as its designated agent), as assignee of the Purchaser, on or before the Closing Date, the documents described in Section 2.01 of the Pooling and Servicing Agreement including, but not limited to, the Servicing Agreements.

The Seller hereby confirms to the Purchaser and the Trustee that it has made the appropriate entries in its general accounting records, to indicate that the Mortgage Loans have been transferred to the Trustee, or a custodian appointed pursuant to the Pooling and Servicing Agreement to act on behalf of the Trustee, and that the Mortgage Loans constitute part of the Trust in accordance with the terms of the Pooling and Servicing Agreement.

The Purchaser hereby acknowledges its acceptance of all right, title and interest in, to and under the Mortgage Loans and other property, and its rights under the Servicing Agreements, now existing or hereafter created, conveyed to it pursuant to Section 2.01 hereof.

The parties hereto intend that the transaction set forth herein be a non-recourse sale by the Seller to the Purchaser of all of the Seller’s right, title and interest in, to and under the Mortgage Loans and other property described in Section 2.01. Nonetheless, in the event the transaction set forth herein is deemed not to be a sale, the Seller hereby grants to the Purchaser a security interest in all of the Seller’s right, title and interest in, to and under the Mortgage Loans and other property described in Section 2.01, whether now existing or hereafter created, to secure all of the Seller’s obligations hereunder; and this Agreement shall constitute a security agreement under applicable law. The Seller and the Purchaser shall, to the extent consistent with this Agreement, take such actions as may be necessary to ensure that, if this Agreement were deemed to create a security interest in the Mortgage Loans, such security interest would be deemed to be a perfected security interest of first priority under applicable law and will be maintained as such throughout the term of the Pooling and Servicing Agreement.

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Section 2.03.UPayment of Purchase Price for the Mortgage LoansU. In consideration of the sale of the Mortgage Loans from the Seller to the Purchaser on the Closing Date, the Purchaser agrees to pay to the Seller on the Closing Date by transfer of immediately available funds, an amount equal to $827,067,773.65 (which amount includes accrued interest) (the “Purchase Price”). The Seller shall pay, and be billed directly for, all reasonable expenses incurred by the Purchaser in connection with the issuance of the Certificates, including, without limitation, printing fees incurred in connection with the Prospectus Supplement and the Private Placement Memorandum relating to the Certificates, fees and expenses of Purchaser’s counsel, fees of the rating agencies requested to rate the Certificates, accountant’s fees and expenses and other out-of-pocket costs, if any.

ARTICLE III

REPRESENTATIONS AND WARRANTIES; REMEDIES FOR BREACH

Section 3.01.U[Reserved]

Section 3.02.USeller’s Representations and WarrantiesU. The Seller represents, warrants and covenants to the Purchaser as of the Closing Date or as of such other 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 Purchaser, 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;

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(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 by the Purchaser, the Purchaser 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 this Agreement are not subject to the bulk transfer or any similar statutory provisions.

Section 3.03.URemedies for Breach of Representations and WarrantiesU. It is understood and agreed that (i) the representations and warranties set forth in Section 3.02 shall survive the sale of the Mortgage Loans to the Purchaser and shall inure to the benefit of the Purchaser and the Trustee, notwithstanding any restrictive or qualified endorsement on any Mortgage Note or Assignment or the examination or lack of examination of any Mortgage File and (ii) the remedies for the breach of such representations and warranties and for the failure to deliver the documents referred to in Section 2.02 hereof shall be as set forth in Section 2.03 of the Pooling and Servicing Agreement. Upon discovery by either the Seller or the Purchaser of a breach of any of the representations and warranties set forth in Section 3.02 that adversely and materially affects the value of the related Mortgage Loan or the interest therein of the Certificateholders or the Certificate Insurer, the party discovering such breach shall give prompt written notice to the other party. Within 90 days of the discovery of any such breach, the Seller shall either (a) cure such breach in all material respects, (b) repurchase such Mortgage Loan or any property acquired in respect thereof from the Purchaser at the applicable Purchase Price (as defined in the Pooling

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and Servicing Agreement) or (c) within the two-year period following the Closing Date, as applicable, substitute a Qualifying Substitute Mortgage Loan for the affected Mortgage Loan, each as set forth in Section 2.03 of the Pooling and Servicing Agreement.

ARTICLE IV

SELLER’S COVENANTS

Section 4.01.UCovenants of the SellerU. The Seller hereby covenants that, except for the transfer hereunder, it 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; it will notify the Trustee, as assignee of the Purchaser, of the existence of any Lien on any Mortgage Loan immediately upon discovery thereof; and it will defend the right, title and interest of the Trust, as assignee of the Purchaser, in, to and under the Mortgage Loans, against all claims of third parties claiming through or under the Seller; UprovidedU, UhoweverU, that nothing in this Section 4.01 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 V

[Reserved]

ARTICLE VI

TERMINATION

Section 6.01.UTerminationU. The respective obligations and responsibilities of the Seller and the Purchaser created hereby shall terminate, except for the Seller’s indemnity obligations as provided herein, upon the termination of the Trust as provided in Article X of the Pooling and Servicing Agreement.

ARTICLE VII

MISCELLANEOUS PROVISIONS

Section 7.01.UAmendmentU. This Agreement may be amended from time to time by the Seller and the Purchaser by written agreement signed by the parties hereto.

Section 7.02.UGoverning LawU. This Agreement shall be governed by and construed in accordance with the laws of the State of New York, without reference to its conflict of law provisions (other than Section 5-1401 of the General Obligations Law), and the obligations, rights and remedies of the parties hereunder shall be determined in accordance with such laws.

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Section 7.03.UNoticesU. All demands, notices and communications hereunder shall be in writing and shall be deemed to have been duly given if personally delivered at or mailed by registered mail, postage prepaid, addressed as follows:

if to the Seller:

Greenwich Capital Financial Products, Inc.

600 Steamboat Road

Greenwich, Connecticut 06830

Attention: Legal Department

or such other address as may hereafter be furnished to the Purchaser in writing by the Seller.

if to the Purchaser:

Greenwich Capital Acceptance, Inc.

600 Steamboat Road

Greenwich, Connecticut 06830

Attention: Legal Department

or such other address as may hereafter be furnished to the Seller in writing by the Purchaser.

Section 7.04.USeverability of ProvisionsU. If any one or more of the covenants, agreements, provisions or terms of this Agreement shall be held invalid for any reason whatsoever, then such covenants, agreements, provisions or terms shall be deemed severable from the remaining covenants, agreements, provisions or terms of this Agreement and shall in no way affect the validity of enforceability of the other provisions of this Agreement.

Section 7.05.UCounterpartsU. This Agreement may be executed in one or more counterparts and by the different parties hereto on separate counterparts, which may be transmitted by telecopier each of which, when so executed, shall be deemed to be an original and such counterparts, together, shall constitute one and the same agreement.

Section 7.06.UFurther AgreementsU. The parties hereto each agree to execute and deliver to the other such additional documents, instruments or agreements as may be necessary or reasonable and appropriate to effectuate the purposes of this Agreement or in connection with the issuance of the Certificates representing interests in the Trust Fund, including the Mortgage Loans.

Without limiting the generality of the foregoing, as a further inducement for the Purchaser to purchase the Mortgage Loans from the Seller, the Seller will cooperate with the Purchaser in connection with the sale of the Certificates. In that connection, the Seller will provide to the Purchaser any and all information and appropriate verification of information, whether through letters of its auditors and counsel or otherwise, as the Purchaser shall reasonably request and will provide to the Purchaser such additional representations and warranties, covenants, opinions of counsel, letters from auditors, and certificates of public officials or officers of the Seller as are reasonably required in connection with the offering of the Certificates.

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Section 7.07.UIntention of the PartiesU. It is the intention of the parties that the Purchaser is purchasing, and the Seller is selling, the Mortgage Loans rather than pledging such Mortgage Loans to secure a loan by the Purchaser to the Seller. Accordingly, the parties hereto each intend to treat the transaction as a sale by the Seller, and a purchase by the Purchaser, of the Mortgage Loans. The Purchaser will have the right to review the Mortgage Loans and the related Mortgage Files to determine the characteristics of the Mortgage Loans which will affect the Federal income tax consequences of owning the Mortgage Loans and the Seller will cooperate with all reasonable requests made by the Purchaser in the course of such review.

Section 7.08.USuccessors and Assigns: Assignment of Purchase AgreementU. This Agreement shall bind and inure to the benefit of and be enforceable by the Seller, the Purchaser and the Trustee. The obligations of the Seller under this Agreement cannot be assigned or delegated to a third party without the consent of the Purchaser which consent shall be at the Purchaser’s sole discretion, except that the Purchaser acknowledges and agrees that the Seller may assign its obligations hereunder to any Person into which the Seller is merged or any corporation resulting from any merger, conversion or consolidation to which the Seller is a party or any Person succeeding to the business of the Seller. The parties hereto acknowledge that the Purchaser is acquiring the Mortgage Loans and the rights of the Seller under the Servicing Agreements for the purpose of contributing them to a trust that will issue the Certificates representing undivided interests in such Mortgage Loans. As an inducement to the Purchaser to purchase the Mortgage Loans, the Seller acknowledges and consents to the assignment by the Purchaser to the Trustee of all of the Purchaser’s rights against the Seller pursuant to this Agreement insofar as such rights relate to Mortgage Loans transferred to the Trustee and to the enforcement or exercise of any right or remedy against the Seller pursuant to this Agreement by the Trustee. Such enforcement of a right or remedy by the Trustee shall have the same force and effect as if the right or remedy had been enforced or exercised by the Purchaser directly.

Section 7.09.USurvivalU. The representations and warranties set forth in Section 3.02 hereof shall survive the purchase of the Mortgage Loans hereunder.

Section 7.10.[UReserved]U.

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IN WITNESS WHEREOF, the Seller and the Purchaser have caused their names to be signed to this Mortgage Loan Purchase Agreement by their respective officers thereunto duly authorized as of the day and year first above written.

GREENWICH CAPITAL ACCEPTANCE, INC.,

as Purchaser

By: /s/ Shakti Radhakishun

Name: Shakti Radhakishun

Title: Senior Vice President

GREENWICH CAPITAL FINANCIAL PRODUCTS, INC.,

as Seller

By: /s/ Shakti Radhakishun

Name: Shakti Radhakishun

Title: Senior Vice President

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SCHEDULE I

MORTGAGE LOAN SCHEDULE

[To be retained in a separate closing binder entitled “Harborview 2007-4 Mortgage Loan

Schedule” at the Washington, DC offices of McKee Nelson LLP]

SCHEDULE II

LIST OF SERVICING AGREEMENTS

1.Amended and Restated Master Interim Servicing Agreement dated as of January 1, 2006, between GCFP and GMAC Mortgage, LLC (as successor by merger to GMAC Mortgage Corporation) (“GMACM”), as reconstituted pursuant to a Reconstituted Servicing Agreement dated as of May 1, 2007 by and between GCFP and GMACM and acknowledged by Wells Fargo and Deutsche Bank.

2.Master Mortgage Loan Purchase and Servicing Agreement dated as of February 1, 2007, between GCFP and SunTrust Mortgage, Inc. (“SunTrust”), as reconstituted pursuant to a Reconstituted Servicing Agreement dated as of May 1, 2007 by and between GCFP and SunTrust and acknowledged by Wells Fargo and Deutsche Bank.

3.Servicing Agreement dated as of March 1, 2007, between GCFP and Central Mortgage Company (“CMC”), as reconstituted pursuant to a Reconstituted Servicing Agreement dated as of May 1, 2007 by and between GCFP and CMC and acknowledged by Wells Fargo and Deutsche Bank.

4.Master Mortgage Loan Purchase and Servicing Agreement dated as of April 1, 2003, as amended by Amendment Number One, dated as of November 1, 2004 and as further amended by Amendment Regulation AB, dated as of December 1, 2005, between GCFP and Countrywide Home Loans Servicing LP (“Countrywide”), as reconstituted pursuant to a Reconstituted Servicing Agreement dated as of May 1, 2007 by and between GCFP and Countrywide and acknowledged by Wells Fargo and Deutsche Bank.

5.Mortgage Loan Servicing Agreement dated as of February 1, 2006, between GCFP and Mellon Trust of New England, National Association (f/k/a Boston Safe Deposit and Trust Company) (“Mellon Trust”), as reconstituted pursuant to a Reconstituted Servicing Agreement dated as of May 1, 2007 by and between GCFP and Mellon Trust and acknowledged by Wells Fargo and Deutsche Bank.

6.Purchase, Warranties and Servicing Agreement, dated as of August 1, 2004, as amended by Amendment Number One, dated as of January 12, 2007, between GCFP and U.S. Central Federal Credit Union (“U.S. Central”), as reconstituted pursuant to an Assignment, Assumption and Recognition Agreement dated as of May 1, 2007 by and between GCFP and U.S. Central and acknowledged by Wells Fargo and Deutsche Bank.

7.Master Mortgage Loan Purchase and Servicing Agreement dated as of March 1, 2007, between GCFP and Lydian Private Bank (“Lydian”), as reconstituted pursuant to a Reconstituted Servicing Agreement dated as of May 1, 2007 by and between GCFP and Lydian and acknowledged by Wells Fargo and Deutsche Bank.