1. Computational Biophysics Research Team, RIKEN Center for Computational Science, Kobe, Hyogo 650-0047, Japan
2. Theoretical Molecular Science Laboratory, RIKEN Cluster for Pioneering Research, Wako, Saitama 351-0198, Japan
3. Laboratory for Biomolecular Function Simulation, RIKEN Center for Biosystems Dynamics Research, Kobe, Hyogo 650-0047, Japan
4. Graduate School of Life Science, University of Hyogo, Harima Science Park City, Hyogo 678-1297, Japan
5. Department of Chemistry, Tokyo University of Science, Shinjuku-ku, Tokyo 162-8601, Japan
6. Department of Bioinformatics, Maebashi Institute of Technology, Maebashi, Gunma 371-0816, Japan
7. Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan