Exterior Signage. Subject to Landlord's prior written approval, which shall not be unreasonably withheld, conditioned or delayed, and provided all signs are in keeping with the quality, design and style of the Building and Project, Tenant, at its sole cost and expense, may install # identification signage on the monument sign outside the front entrance to the Building (which monument Landlord shall install at its sole cost prior to the Lease Commencement Date) # Building entrance signage, internal directional and lobby identification signage, and # one (1) sign on the Building in a mutually reasonably approved location all in accordance with the Project master signage program (collectively, "Tenant Signage"); provided, however, # in no event shall Tenant's Signage include an "Objectionable Name," as that term is defined in [Section 23.3], of this Lease, and # if not already completed, Landlord shall consult with Tenant prior to finalizing the master signage program and consider in good faith Tenant's reasonable comments with respect thereto. All such signage shall be subject to Tenant's obtaining all required governmental approvals. All permitted signs shall be maintained by Tenant at its expense in a first-class and safe condition and appearance. Upon the expiration or earlier termination of this Lease, Tenant shall remove all of its signs at Tenant's sole cost and expense. The graphics, materials, color, design, lettering, lighting, size, illumination, specifications and exact location of Tenant's Signage (collectively, the "Sign Specifications") shall be subject to the prior written approval of Landlord, which approval shall not be unreasonably withheld, conditioned or delayed, and shall be consistent and compatible with the quality and nature of the Project. Tenant hereby acknowledges that, notwithstanding Landlord's approval of Tenant's Signage, Landlord has made no representation or warranty to Tenant with respect to the probability of obtaining all necessary governmental approvals and permits for Tenant's Signage. In the event Tenant does not receive the necessary governmental approvals and permits for Tenant's Signage, Tenant's and Landlord's rights and obligations under the remaining terms of this Lease shall be unaffected. Except as required by applicable law, Landlord shall not install any other signage on the Building. If Landlord elects to install a multi- tenant identification sign at the entrance to the Project, Tenant shall be entitled to install its name on such sign (subject to availability on a pro-rata basis based on the relative square footages leased by the tenants of the Project), at Tenant's sole cost and expense.

Signage. As used herein, Signage shall mean any signs, advertising placards, banners, pennants, names, insignias, trademarks, balloons, flags, decals or other decorative or descriptive material installed on the Project.

Tenant's Insurance. Tenant shall maintain the following coverages in the following amounts during the Lease Term (except Tenant shall carry the insurance described in [Section 10.3.1] during any period in which it enters the Premises).

Tenant's Reimbursement. Except as may be specifically provided to the contrary in this Lease, Tenant shall pay to Landlord, upon delivery by Landlord to Tenant of statements therefor: # sums equal to expenditures reasonably made and obligations incurred by Landlord in connection with the remedying by Landlord of Tenant's defaults pursuant to the provisions of [Section 26.1]; # sums equal to all losses, costs, liabilities, damages and expenses referred to in [Article 10] of this Lease; and # subject to [Section 29.21], sums equal to all expenditures made and obligations incurred by Landlord in collecting or attempting to collect the Rent or in enforcing or attempting to enforce any rights of Landlord under this Lease or pursuant to law, including, without limitation, all reasonable ​ fees and other amounts so expended. Tenant's obligations under this [Section 26.2] shall survive the expiration or sooner termination of the Lease Term.

Tenant's Representative. Prior to commencement of construction of the Improvements, Tenant shall, by written notice to Landlord, designate an individual to act as Tenant's sole representative with respect to the matters set forth in this Tenant Work Letter, who, until further notice to Landlord, shall have full authority and responsibility to act on behalf of the Tenant as required in this Tenant Work Letter.

Objectionable Name. Tenant's Signage shall not include a name or logo which relates to an entity which is of a character or reputation, or is associated with a political faction or orientation, which is inconsistent with the quality of the Project, or which would otherwise reasonably offend a landlord of the Comparable Buildings (an "Objectionable Name"). Landlord agrees that "Graphite Bio, Inc.", or a reasonable derivation thereof, is not an Objectionable Name.

During the Inspection Period, Buyer shall propose its signage to Seller for approval, as to type, size, appearance, and placement. Seller shall not unreasonably withhold its approval of the signage, so long as the signage meets all applicable governmental requirements and is limited so as not to clutter the Property. After approval by Seller, Buyer may place the signage in the agreed locations prior to closing.

Maintenance. Tenant shall maintain its Signage, including the illumination of the same at its sole cost and expense. Landlord may repair or maintain Tenant’s Signage, at Tenant’s expense, if Tenant does not maintain its signage after ten days written notice from Landlord.

Tenant Repair Obligations. Tenant shall, throughout the Term, at its sole cost and expense, maintain, repair or replace as required, the Premises in a good standard of maintenance, repair and replacement as required, and in good and sanitary condition, all in accordance with the standards of First Class Life Sciences Projects, except for the Landlord Repair Obligations, whether or not such maintenance, repair, replacement or improvement is required in order to comply with applicable Laws ("Tenant's Repair Obligations"), including without limitation, all electrical facilities and equipment, including lighting fixtures, lamps, fans and any exhaust equipment and systems, electrical motors and all other appliances and equipment of every kind and nature located in the Premises; all communications systems serving the Premises; all of Tenant's security systems in or about or serving the Premises; Tenant's signage; interior demising walls and partitions (including painting and wall coverings), equipment, floors. Tenant shall additionally be responsible, at Tenant’s sole cost and expense, to furnish all expendables, including light bulbs, paper goods and soaps, used in the Premises.

Tenant's Right to Make Repairs. Notwithstanding any provision to the contrary contained in this Lease, if Tenant provides written notice to Landlord of an event or circumstance which requires the action of Landlord under this Lease with respect to repair and/or maintenance required in the Premises, including repairs to the portions of the Building located within the Premises that are Landlord’s responsibility under [Section 7.4] (the "Base Building"), which event or circumstance with respect to the Base Building materially and adversely affects the conduct of Tenant’s business from the Premises, and Landlord fails to commence corrective action within a reasonable period of time, given the circumstances, after the receipt of such notice, but in any event not later than thirty (30) days after receipt of said notice (unless Landlord’s obligation cannot reasonably be performed within thirty (30) days, in which event Landlord shall be allowed additional time as is reasonably necessary to perform the obligation so long as Landlord begins performance within the initial thirty (30) days and diligently pursues performance to completion), or, in the event of an Emergency (as defined below), not later than five (5) business days after receipt of such notice, then Tenant shall have the right to undertake such actions as may be reasonably necessary to make such repairs if Landlord thereafter fails to commence corrective action within five (5) business days following Landlord's receipt of a second written notice from Tenant specifying that Tenant will undertake such actions if Landlord fails to timely do so (provided that such notice shall include the following language in bold, capitalized text: "IF LANDLORD FAILS TO COMMENCE THE REPAIRS DESCRIBED IN THIS LETTER WITHIN FIVE # BUSINESS DAYS FROM LANDLORD'S RECEIPT OF THIS LETTER, TENANT WILL PERFORM SUCH REPAIRS AT LANDLORD'S EXPENSE"; provided, however, that in no event shall Tenant undertake any actions that could materially or adversely affect the Base Building. Notwithstanding the foregoing, in the event of an Emergency, no second written notice shall be required as long as Tenant advises Landlord in the first written notice of Tenant's intent to perform such Emergency repairs if Landlord does not commence the same within such five (5) business day period, utilizing the language required in second notices. If such action was required under the terms of this Lease to be taken by Landlord and was not commenced by Landlord within such five (5) business day period and thereafter diligently pursued to completion, then Tenant shall be entitled to prompt reimbursement by Landlord of the reasonable out-of- pocket third-party costs and expenses actually incurred by Tenant in taking such action. If Tenant undertakes such corrective actions pursuant to this [Section 7.3], then # the insurance and indemnity provisions set forth in this Lease shall apply to Tenant's performance of such corrective actions, # Tenant shall proceed in accordance with all applicable laws, # Tenant shall retain to perform such corrective actions only such reputable contractors and suppliers as are duly licensed and qualified, # Tenant shall effect such repairs in a good and workmanlike and commercially reasonable manner, # Tenant shall use new or like new materials, and # Tenant shall take reasonable efforts to minimize any material interference or impact on the other tenants and occupants of the Building. Promptly following completion of any work taken by Tenant pursuant to the terms of this [Section 7.5], Tenant shall deliver a detailed invoice of the work completed, the materials used and the costs relating thereto, and Landlord shall reimburse Tenant the amounts expended by Tenant in connection with such work, provided that Landlord shall have the right to object if Landlord claims that such action did not have to be taken by Landlord pursuant to the terms of this Lease or that the charges are excessive (in which case Landlord shall pay the amount it contends would not have been excessive). For purposes of this [Section 7.5], an "Emergency" shall mean an event threatening immediate and material danger to people located in the Building or immediate, material damage to the Building, Base Building, or creating a realistic possibility of an immediate and material interference with, or immediate and material interruption of a material aspect of Tenant's business operations.