RIKEN Genomic Sciences Center, Suehiro-cho 1-7-22-E216, Tsurumi-ku, Yokohama, Kanagawa, 230-0045, Japan. takasaki@gsc.riken.jp|RIKEN Genomic Sciences Center, Suehiro-cho 1-7-22-E216, Tsurumi-ku, Yokohama, Kanagawa, 230-0045, Japan. takasaki@gsc.riken.jp|RIKEN Genomic Sciences Center, Suehiro-cho 1-7-22-E216, Tsurumi-ku, Yokohama, Kanagawa, 230-0045, Japan. takasaki@gsc.riken.jp