1. Max-Planck-Institut für Kohlenforschung , Mülheim an der Ruhr, Germany.
2. Laboratory for Biomolecular Simulation Research, Center for Integrative Proteomics Research, and Department of Chemistry and Chemical Biology, Rutgers University , Piscataway, NJ, USA.
3. Laboratory of Computational Biology, National Heart Lung and Blood Institute, National Institutes of Health , Bethesda, MD, USA.