1. Department of Cellular Biology; Research Institute for Radiation Biology and Medicine; Hiroshima University; Hiroshima 734-8551 Japan
2. Department of Ophthalmology and Visual Science; Graduate School of Biomedical Sciences; Hiroshima University; Hiroshima 734-8551 Japan
3. Research Center for the Mathematics on Chromatin Live Dynamics; Hiroshima University; Hiroshima 734-8551 Japan
4. Research Center for Environmental Quality Management; Kyoto University; Otsu, Shiga 520-0811 Japan
5. Laboratory of Chromatin Regulatory Network; Department of Mutagenesis; Radiation Biology Center; Kyoto University; Yoshida Konoe-cho, Sakyo-ku, Kyoto 606-8501 Japan
6. Laboratory of Structural Biology; Graduate School of Advanced Science and Engineering; Waseda University; 2-2 Wakamatsu-cho, Shinjuku-ku, Tokyo 162-8480 Japan
7. National Institute of Biomedical Innovation; 7-6-8 Saito-Asagi, Ibaraki, Osaka 567-0085 Japan