1. Department of Applied Science, University of California, Davis, California 95616, Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, Department of Chemistry, Indiana University - Purdue University Fort Wayne, Fort Wayne, Indiana 46805-1499, Department of Biochemistry and Molecular Biology, University of Georgia, Athens, Georgia 30602-7229, and Department of Chemistry, Louisiana...