Exhibit 4.2


 


		 	NUMBER

NUMBER C-SHARES

SEE REVERSE FOR

CERTAIN DEFINITIONS

CUSIP [•]



 


SCIENCE
STRATEGIC ACQUISITION CORP ALPHA


 


INCORPORATED
UNDER THE LAWS OF THE STATE OF DELAWARE

CLASS A COMMON STOCK


 


This Certifies that


 


is the owner of


 


FULLY PAID AND NON-ASSESSABLE SHARES OF THE PAR VALUE OF $0.0001
EACH OF THE CLASS A COMMON STOCK OF


 


SCIENCE STRATEGIC ACQUISITION CORP ALPHA

(THE “CORPORATION”)


 


transferable on the books of the Corporation in person or by
duly authorized attorney upon surrender of this certificate properly endorsed.


 


The Corporation will be forced to redeem all of its shares of
Class A common stock if it is unable to complete a business combination by [●], 2023, all as more fully described in
the Corporation’s final prospectus dated [●], 2021.


 


This certificate is not valid unless countersigned by the Transfer
Agent and registered by the Registrar.


 


Witness the seal of the Corporation and the facsimile signatures
of its duly authorized officers.


 


	Secretary	[Corporate Seal]

 Delaware	President


 


SCIENCE STRATEGIC ACQUISITION CORP ALPHA


 


The Corporation will furnish without charge to each stockholder
who so requests the powers, designations, preferences and relative, participating, optional or other special rights of each class
of stock or series thereof of the Corporation and the qualifications, limitations, or restrictions of such preferences and/or rights.
This certificate and the shares represented thereby are issued and shall be held subject to all the provisions of the Certificate
of Incorporation and all amendments thereto and resolutions of the Board of Directors providing for the issue of securities (copies
of which may be obtained from the secretary of the Corporation), to all of which the holder of this certificate by acceptance hereof
assents. The following abbreviations, when used in the inscription on the face of this certificate, shall be construed as though
they were written out in full according to applicable laws or regulations:


 









     


     


    

 


	TEN COM	–	as tenants in common	 	UNIF GIFT MIN ACT	–	Custodian
	 	 	 	 	 	 	 
	TEN ENT	–	as tenants by the entireties	 	 	 	 
	 	 	 	 	 	 	(Cust) (Minor)
	JT TEN	–	as joint tenants with right of survivorship and not as tenants in common	 	 	 	under Uniform Gifts to Minors Act
	 	 	 	 	 	 	(State)


 


Additional abbreviations may also be used though not in the
above list.


 


For value received, ______ hereby sells, assigns and transfers
unto


 


(PLEASE INSERT SOCIAL SECURITY OR OTHER
IDENTIFYING NUMBER(S) OF ASSIGNEE(S))


(PLEASE PRINT OR TYPEWRITE NAME(S) AND
ADDRESS(ES), INCLUDING ZIP CODE, OF ASSIGNEE(S))


 


Shares of the capital stock represented by the within Certificate,
and do hereby irrevocably constitutes and appoints


 


Attorney to transfer the said stock on the books of the within
named Corporation with full power of substitution in the premises.


 


Dated:


 


NOTICE: THE SIGNATURE(S) TO THIS ASSIGNMENT MUST CORRESPOND
WITH THE NAME AS WRITTEN UPON THE FACE OF THE CERTIFICATE IN EVERY PARTICULAR, WITHOUT ALTERATION OR ENLARGEMENT OR ANY CHANGE
WHATEVER.


 


Signature(s) Guaranteed:


 


By


 


THE SIGNATURE(S) MUST BE GUARANTEED BY AN ELIGIBLE GUARANTOR
INSTITUTION (BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE
MEDALLION PROGRAM, PURSUANT TO S.E.C. RULE 17Ad-15 (OR ANY SUCCESSOR RULE).


 


In each case, as more fully described in the Corporation’s
final prospectus dated [●], 2021, the holder(s) of this certificate shall be entitled to receive a pro-rata portion
of certain funds held in the trust account established in connection with its initial public offering only in the event that (i) the
Corporation redeems the shares of Class A common stock sold in its initial public offering and liquidates because it does
not consummate an initial business combination by [●], 2023, (ii) the Corporation redeems the shares of Class A
common stock sold in its initial public offering in connection with a stockholder vote to amend the Corporation’s second
amended and restated certificate of incorporation to modify the substance or timing of the Corporation’s obligation to redeem
100% of the Class A common stock if it does not consummate an initial business combination by [●], 2023, or (iii) if
the holder(s) seek(s) to redeem for cash his, her or its respective shares of Class A common stock in connection
with a tender offer (or proxy solicitation, solely in the event the Corporation seeks stockholder approval of the proposed initial
business combination) setting forth the details of a proposed initial business combination. In no other circumstances shall the
holder(s) have any right or interest of any kind in or to the trust account.


 






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