1. Department
of Chemistry, University of Michigan, 930 N. University, Ann Arbor, Michigan 48109, United States
2. Computational Chemistry, Modeling and Simulation, The Procter & Gamble Company, 8611 Beckett Road, West Chester, Ohio 45069, United States
3. Biophysics
Program, University of Michigan, 930 N. University, Ann Arbor, Michigan 48109, United States