1. Molecular Pharmacology Laboratory, College of Pharmacy, University of Texas at Austin, Austin, Texas 78712-1074, Institute for Neuroscience, University of Texas at Austin, Austin, Texas 78712, Laboratory for Molecular Graphics and Theoretical Modeling, College of Pharmacy, University of Texas at Austin, Austin, Texas 78712, Laboratory of Protein Modeling, Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02167, Psychiatry Service, VA Medical Center, Department of Veterans Affairs,...