1. Center for Biophysics and Quantitative Biology, University of Illinois Urbana−Champaign, Urbana, Illinois 61801, United States
2. Department of Chemistry, University of Illinois Urbana−Champaign, Urbana, Illinois 61801, United States
3. Computer Science and Technologies Department, Parkland Community College, Champaign, Illinois 61821, United States
4. Department of Physics, University of Illinois Urbana−Champaign, Urbana, Illinois 61801, United States