1. Laboratory for Biomolecular Simulation Research, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854-8087, United States
2. Institute for Quantitative Biomedicine, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854-8087, United States
3. Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
4. Department of Biochemistry and Molecular Biology, The University of Chicago, Chicago, Illinois 60637, United States
5. Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854-8087, United States