1. Department of Pharmacology and Molecular Sciences, The Johns Hopkins University School of Medicine, 725 North Wolfe Street, Baltimore, Maryland 21205-2185, Department of Chemistry, Washington University, One Brookings Drive, St. Louis, Missouri 63130, Department of Physics, Binghamton University, Binghamton, New York 13902, and The Center for Advanced Research in Biotechnology, University of Maryland Biotechnology Institutes, and The National Institute of Standards and Technology, 9600 Gudelsky Drive,...