Committee Composition

	Audit Committee	Compensation Committee	Nominating and Corporate Governance Committee
Daniel R. Marshak, Ph.D.	Audit Committee	Compensation Committee
Ann Merrifield		Compensation Committee	Nominating and Corporate Governance Committee
Christina Morrison	Audit Committee	Compensation Committee
Sir Richard J. Roberts, Ph.D.		Compensation Committee	Nominating and Corporate Governance Committee
Robert J. Rosenthal, Ph.D.	Audit Committee		Nominating and Corporate Governance Committee

= Chairperson = Member = Chair of the Board