RIKEN Omics Science Center, RIKEN Yokohama Institute, Yokohama, Kanagawa, Japan. kawaji@gsc.riken.jp|RIKEN Omics Science Center, RIKEN Yokohama Institute, Yokohama, Kanagawa, Japan. kawaji@gsc.riken.jp|RIKEN Omics Science Center, RIKEN Yokohama Institute, Yokohama, Kanagawa, Japan. kawaji@gsc.riken.jp