the Rent previously payable (or which would have been payable but for any abatement or suspension of the Rent or restriction on the right to collect it) under the Lease prior to forfeiture or disclaimer; and

Notwithstanding anything contained in this Lease to the contrary, but subject to paragraph # below, in the event that Tenant receives payments in the nature of rent from any subtenant of the Premises with respect to such subtenant’s occupancy of the Premises during the Abatement Period, net of the reasonable, out-of-pocket expenses which Tenant reasonably incurred in connection with procurement of such sublease, amortized on a straight-line basis over the initial term of such sublease (“Abatement Period Sublease Rent”), then Tenant shall pay to Landlord, as additional rent, an amount (each such amount, an “Abatement Period Sublease Payment”) equal to seventy five percent (75%) of the Abatement Period Sublease Rent. Tenant shall pay to Landlord any Abatement Period Sublease Payment within fifteen (15) business days after each date that Tenant receives any installment of Abatement Period Sublease Rent from a subtenant, (and, if there are any such payment(s) received by Tenant under or in connection with the sublease other than a monthly payment which are “disguised”, rental payments as described in [Section 7.4] hereof, such payment(s) shall be included in the Abatement Period Sublease Payment as if payable in equal monthly installments over the term of such sublease). No payments to Tenant shall be deemed to be “disguised” Abatement Period Sublease Rent for purposes of the foregoing where Tenant receives an amount which does not exceed fair market value for furniture, fixtures or other items or services in question. Acceptance by Landlord of any Abatement Period Sublease Payment shall not be deemed to constitute approval by Landlord of any sublease, nor shall such acceptance waive any rights of Landlord hereunder. Landlord shall, upon reasonable prior written notice have the right to inspect and audit Tenant’s books and records relating to any sublease, but solely for the limited purpose of verifying the amounts which could reasonably be expected to be due hereunder, and subject to Landlord executing a commercially reasonable confidentiality agreement.

In addition to Base Rent, Tenant shall pay to Landlord as additional rent (“Additional Rent”), commencing on the Term Commencement Date (or the Expense Trigger Date (as defined below) with respect to Operating Expenses) and at times hereinafter specified in this Lease, notwithstanding any abatement of Base Rent provided in Section 8 below, # Tenant’s Adjusted Share (as defined below) of Operating Expenses (as defined below), # the Property Management Fee (as defined below) and # any other amounts that Tenant assumes or agrees to pay under the provisions of this Lease that are owed to Landlord, including any and all other sums that may become due by reason of any default of Tenant or failure on Tenant’s part to comply with the agreements, terms, covenants and conditions of this Lease to be performed by Tenant, after notice and the lapse of any applicable cure periods.

Offset to Abatement. Reference is made to the lease dated December 14, 1999 (as amended, the “Existing Lease”) by and between Tenant, as tenant, and BP 140 Kendrick Street Property LLC, as landlord (the “Existing Landlord”), in respect of premises containing approximately 321,000 rentable square feet in area (the “Existing Premises”) located at 140 Kendrick Street, Needham, Massachusetts. Tenant has provided Landlord with a true and complete copy of the Existing Lease and all amendments and modifications thereto.

Plus: Property Rent Expense (base rent + any % rent)

Rent and all other sums payable to Lessor hereunder shall be paid without notice, demand, counterclaim, set-off, deduction or defense and without abatement, suspension, deferment, diminution or reduction. Except as expressly provided herein, Lessee waives all rights now or hereafter conferred by statute or otherwise to quit, terminate or surrender this Agreement or the Real Property or any part thereof, or to any abatement, suspension, deferment, diminution or reduction of rent or any other sum payable by Lessee hereunder.

All monthly installments of Base Rent, all Additional Rent and all monthly installments of estimated Additional Rent have been paid when due through . The current monthly installment of Base Rent is $ .

No Accord and Satisfaction. No payment by Tenant or receipt by Landlord of a lesser amount than the monthly installment of Base Rent or any Additional Rent will be other than on account of the earliest stipulated Base Rent and Additional Rent, nor will any endorsement or statement on any check or letter accompanying a check for payment of any Base Rent or Additional Rent be an accord and satisfaction. Landlord may accept such check or payment without prejudice to Landlord’s right to recover the balance of such Rent or to pursue any other remedy provided in this Lease.

Base Rent.................................................................................................................................... 14

Definition. As used herein, the term Rent includes Base Rent, Percentage Rent and all other monetary obligations of the Tenant under this Lease.