1. Theoretical Molecular Science Laboratory, RIKEN Cluster for Pioneering Research Wako‐shi Saitama 351‐0198 Japan
2. Computational Biophysics Research Team, RIKEN Center for Computational Science Kobe 650‐0047 Japan
3. Division of Liberal Arts and ScienceKyoto Pharmaceutical University Kyoto 607‐8414 Japan
4. Laboratory for Biomolecular Function SimulationRIKEN Center for Biosystem Dynamics Research Kobe 650‐0047 Japan