1. Department
of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
2. Center
for the Physics of Living Cells, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
3. Beckman
Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
4. Carl
Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States