1. Departments of Chemistry and Biochemistry, Molecular Biology, and Cell Biology, Center for Molecular Innovation and Drug Discovery, Chemistry of Life Processes Institute, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, Departments of Molecular Biology and Biochemistry, Pharmaceutical Chemistry, and Chemistry, University of California, Irvine, California 92697-3900, Department of Biochemistry, University of Texas Health Science Center, San Antonio, Texas 78229, and Department...