1. Department of Biology, University of California at San Diego, La Jolla, California 92093, Department of Molecular Biology, The Scripps Research Institute, La Jolla, California 92037, Department of Chemistry, University of Rochester, Rochester, New York 14627-0216, Department of Chemistry, Occidental College, Los Angeles, California 90041, Department of Environmental and Biomolecular Systems, OGI School of Science and Engineering, Oregon Health and Science University, Beaverton, Oregon 97006-8921,...