AMENDMENT NO. 2 TO TRANSITION SERVICES AGREEMENT

Exhibit 10.51

AMENDMENT NO. 2
TO
TRANSITION SERVICES AGREEMENT

THIS AMENDMENT NO. 2 (this “Amendment”), dated June 15, 2007 (the “Effective Date”), amends the Transition Services Agreement between BIO-RAD LABORATORIES, INC. (“BIO-RAD”) and CIPHERGEN BIOSYSTEMS, INC. (“CIPHERGEN”) dated November 13, 2006 (the “Agreement”). The parties hereby agree as follows:

	1.	The term of the Transition Period on all Schedules to the Agreement is hereby extended through June 29, 2007.
	2.	Except as expressly modified by this Amendment, all of the terms and conditions of the Agreement shall remain in full force and effect.

     IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be executed by their respective authorized representatives.

CIPHERGEN BIOSYSTEMS, INC.						BIO-RAD LABORATORIES, INC.
By:		/s/ Xxxxxxx Xxxxxxxx				By:		/s/ Xxxxxxx Xxxxxx
Name:		Xxxxxxx Xxxxxxxx				Name:		Xxxxxxx Xxxxxx
Its:						Its: