1. From the Institute of Molecular Cardiology (W.S., R.W., H.Y., J.W., R.T.W., J.E.D., D.M., I.S.C.) and Departments of Physiology and Biophysics (W.S., H.Y., J.W., J.E.D., I.S.C.) and Neurobiology and Behavior (Z.P., D.M.), State University of New York at Stony Brook, Stony Brook, NY; Department of Pharmacology (R.B.R.), Columbia University, College of Physicians and Surgeons, New York, NY; and Department of Biological Science (R.W., R.T.W.), University of Tulsa, Tulsa, Okla.