1. Theoretical and Computational Biophysics Group, NIH Center for Macromolecular Modeling and Bioinformatics, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
2. Department of Chemical Engineering and Materials Science, Wayne State University, Detroit, Michigan 48202, United States
3. Department of Computer Science, Wayne State University, Detroit, Michigan 48202, United States