1. Department of Electronic and Nanostructured Materials, Sandia National Laboratories, Albuquerque, New Mexico 87185-0886, Energetics Characterization Department, Sandia National Laboratories, Albuquerque, New Mexico 87185-1455, Department of Biochemistry and Molecular Biology, Sealy Center for Structural Biology and Molecular Biophysics, and UTMB Bioinformatics Program, University of Texas Medical Branch, Galveston, Texas 77555-1157