1. Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
2. Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
3. National Center for Supercomputing Applications, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
4. Center for Biophysics and Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
5. Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
6. Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
7. School of Chemical Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States