1. Department of Biophysics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan.
2. Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8530, Japan.
3. Cellular Informatics Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako 351-0198, Japan.
4. Laboratory of Organic Chemistry for Life Science, Kobe Pharmaceutical University, Kobe 658-8558, Japan.
5. Research Organization for Science and Technology, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan.