1. Nagahama Institute of Bio-Science and Technology, Tamura; Nagahama Shiga 526-0829 Japan
2. RIKEN Advanced Institute for Computational Science, Chuo-ku; Kobe Hyogo 650-0047 Japan
3. RIKEN Theoretical Molecular Science Laboratory; Wako Saitama 351-0198 Japan
4. Department of Physics; Graduate School of Science; Nagoya University; Nagoya Aichi 464-8602 Japan
5. Structural Biology Research Center; Graduate School of Science; Nagoya University; Nagoya Aichi 464-8602 Japan
6. Center for Computational Science; Graduate School of Engineering; Nagoya University; Nagoya Aichi 464-8603 Japan
7. Information Technology Center; Nagoya University; Nagoya Aichi 464-8601 Japan