1. Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
2. Computer, Computational and Statistical Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
3. Center for Non-linear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
4. Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, California 94158, United States
5. SSRL, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States