1. From the Departments of Cell Biology and Physiology (T.P.F., M.S.R., C.G.N.), Molecular Biology and Pharmacology (J.M.N.), and Internal Medicine (A.K., J.E.S.), Washington University School of Medicine, St Louis, Mo; Institut National de la Santé et de la Recherche Médicale, U-637 (O.C.), Université Montpellier 1, Unité de Formation et de Recherche de Médecine, Montpellier, France; and Pfizer Global Research & Development (T.E.H., M.A.T., A.B., R.E.N.), Chesterfield, Mo.