[1] Waseda Univ, Grad Sch Adv Sci & Engn, Struct Biol Lab, Shinjuku Ku, Tokyo 1628480, Japan
[2] Kyoto Univ, Dept Mutagenesis, Div Chromatin Regulatory Network, Radiat Biol Ctr,Sakyo Ku, Kyoto 6068501, Japan
[3] Hiroshima Univ, Res Inst Radiat Biol & Med, Dept Cellular Biol, Minami Ku, Hiroshima 7348553, Japan
[4] Osaka Univ, Div Gene Therapy Sci, Grad Sch Med, Suita, Osaka 5650871, Japan