1. School of Life Science, Tokyo University of Pharmacy and Life Science, Hachioji 192-0392
2. CREST, Japan
3. Institute of Molecular and Cellular Biosciences, University of Tokyo, Bunkyo-ku, Tokyo 113-0032
4. Computational Biology Research Center, National Institute of Advanced Industrial Science and Technology, Koutou-ku, Tokyo 135-0064
5. Advanced Technology Research Center, Mitsubishi Heavy Industries, Ltd., Kanazawa-ku, Yokohama 236-8515, Japan