1. Department
of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
2. Department
of Physics, Center for the Physics of Living Cells, University of Illinois, Urbana, Illinois 61801, United States
3. School
of Chemical Sciences, University of Illinois, Urbana, Illinois 61801, United States
4. Center
for Biophysics and Computational Biology, University of Illinois, Urbana, Illinois 61801, United States