Form of SeraCare Life Sciences, Inc. common stock certificate



 Exhibit 4.3 
  


					
	[SEAL]	  	SeraCare Life Sciences, Inc.	  	[SEAL]

  
 INCORPORATED UNDER THE
LAWS OF THE STATE OF CALIFORNIA 
  

					
	 	  	 	  	 SEE REVERSE FOR CERTAIN DEFINITIONS
  
 CUSIP 81747Q 10 0


  
 This Certifies
that 
  
 SPECIMEN 
  
 is the record holder of 
  
 FULLY PAID AND NONASSESSABLE SHARES OF COMMON STOCK, NO PAR VALUE, OF

  
 SERACARE LIFE SCIENCES, INC. 
  
 transferable on the books of the Corporation by the holder hereof in person
or by duly authorized attorney upon surrender of this certificate properly endorsed. This certificate is not valid until countersigned by the Transfer Agent and registered by the Registrar. 
  
 WITNESS the facsimile seal of the Corporation and the facsimile signatures of
its duly authorized officers. 
  
 Dated: 
  

					
			
	/s/ Jerry L. Burdick	 	[SEAL]	 	/s/ Michael Crowley II
	SECRETARY	 	 	PRESIDENT AND CEO

  

											
	 	 	 	 	 Countersigned and Registered:
	 	 
				
	 	 	 	 	AMERICAN STOCK TRANSFER & TRUST COMPANY	 	 
				
	 	 	 	 	(New York, New York)	 	Transfer Agent
and Registrar
						
	 	 	 	 	 	 	By	 	 	 	 
	 	 	 	 	 	 	 	 	Authorized Signature	 	 

  









 SERACARE LIFE SCIENCES, INC. 
  
 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 and the qualifications, limitations or restrictions of such preferences and/or rights. Such requests shall be made to the Corporation’s
Secretary at the principal office of the Corporation. 
  
 KEEP
THIS CERTIFICATE IN A SAFE PLACE. IF IT IS LOST, STOLEN, OR DESTROYED THE CORPORATION WILL REQUIRE A BOND OF INDEMNITY AS A CONDITION TO THE ISSUANCE OF A REPLACEMENT CERTIFICATE. 
  
 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
                            
               (Cust)
                                        
          (Minor)

							
	TEN ENT	 	—	 	as tenants by the entireties	 	 	 	 	 	 	  	 under Uniform Gifts to Minors
  
 Act
                                        
                            
 (State)

							
	JT TEN	 	—	 	as joint tenants with right of survivorship and not as tenants in common	 	 	 	UNIF TRF MIN ACT	 	—	  	                          Custodian (until age __________)
             (Cust)
                                        
      
  
                                      under Uniform
Transfers
                 (Minor)
  
 to Minors Act
                                        
                
  
                             (State)


  
 Additional
abbreviations may also be used though not in the above list. 
  
 FOR VALUE RECEIVED,                          hereby sell, assign and transfer unto 
  
 PLEASE INSERT SOCIAL SECURITY OR OTHER 
 IDENTIFYING NUMBER OF ASSIGNEE 
  
 _______________________________________ 
  
 ___________________________________________________________________________________________________________ 
 (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE) 
  
 ___________________________________________________________________________________________________________ 
  
 ___________________________________________________________________________________________________________ 
  
 ______________________________________________________________________________________________________. Shares 
 of the common stock
represented by the within Certificate, and do hereby irrevocably constitute and appoint 
  
 ____________________________________________________________________________________________________Attorney 
 to transfer the said stock on the
books of the within named Corporation with full power of substitution in the premises. 
  
 Dated __________________________________ 
  

			
	X 	 	 
		
	X 	 	 
		
	NOTICE:	 	THE SIGNATURE(S) TO THIS ASSIGNMENT MUST CORRESPOND WITH THE NAME(S) 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.