Committee Composition

Overview of Committee Composition and Member Roles
Director Name	Audit Committee	Compensation Committee	Nominating and Corporate Governance Committee	Science Committee
Paul L. Berns	of the Audit CommitteeAudit Committee
Nathaniel E. David, Ph.D.		of the Compensation CommitteeCompensation Committee		of the Science CommitteeScience Committee
Keith R. Leonard		of the Compensation CommitteeCompensation Committee
Gilmore O’Neill, M.B.				of the Science CommitteeScience Committee
Margo Roberts, Ph.D.			of the Nominating and Corporate Governance CommitteeNominating and Corporate Governance Committee	of the Science CommitteeScience Committee
Michael Samar	of the Audit CommitteeAudit Committee	of the Compensation CommitteeCompensation Committee
Camille D. Samuels	of the Audit CommitteeAudit Committee		of the Nominating and Corporate Governance CommitteeNominating and Corporate Governance Committee

= Chairperson = Member = Chairman of the Board = Financial Expert