1. Medical Scientist Training Program, Washington University School of Medicine, Saint Louis, Missouri 63110, United States
2. Department of Physics, Washington University in St. Louis, Saint Louis, Missouri 63130, United States
3. Department of Chemistry, Washington University in St. Louis, Saint Louis, Missouri 63130, United States
4. Center for Computing Research, Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
5. Department of Biochemistry & Molecular Biophysics, Washington University School of Medicine, Saint Louis, Missouri 63110, United States