1. the Departments of Pharmacology and Cell Biophysics (G.C., W.L., J.P.S., C.T., M.A.M., I.L.G., E.G.K.) and Pathology & Laboratory Medicine (G.P.B.), University of Cincinnati (Ohio); the Center for Anesthesiology Research (W.E.S., C.S.M.), Cleveland (Ohio) Clinic Foundation; and the NMR Laboratory for Physiological Chemistry (M.S., K.W.S., J.S.I.), Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Mass.