1. Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, Illinois 60637, United States
2. Unité Mixte de Recherche No. 7019, Université de Lorraine, B.P. 70239, 54506 Vandœuvre-lès-Nancy cedex, France
3. 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 61820, United States
4. Laboratoire International Associé Centre National de la Recherche Scientifique et University of Illinois at Urbana−Champaign, Unité Mixte de Recherche No. 7019, Université de Lorraine, B.P. 70239, 54506 Vandœuvre-lès-Nancy cedex, France
5. Department of Physics, University of Illinois at Urbana−Champaign, Urbana, Illinois 61820, United States