COMMITTEE COMPOSITION

Independent Director Audit Committee Nominating and Governance Committee Compensation Committee
Stelios Papadopoulos Ph.D. Independent Director Audit Committee Compensation Committee
David Baltimore Ph.D. Independent Director Nominating and Governance Committee Compensation Committee
Mark G. Foletta Independent Director Audit Committee Nominating and Governance Committee
William Rastetter Ph.D. Independent Director Audit Committee Compensation Committee
Hugh Rosen Independent Director Nominating and Governance Committee Compensation Committee
Pascale Witz Independent Director Audit Committee Nominating and Governance Committee
= Independent Director = Chairperson = Member = Chairman of the Board