1. Department of Biochemistry, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
2. Department of Medicinal Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
3. Center for Biophysics and Computational Biology, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
4. Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States