Tsuneyuki Ubagai1, Masako Ochiai, Toshihiko Kawamori, Hiroshi Imai, Takashi Sügimura, Minako Nagao, Hitoshi Nakagama2
1Biochemistry Division, National Cancer Center Research Institute,1‐1 Tsukiji, 5‐chome, Chuo‐ku, Tokyo 104‐0045, Japan
2National Cancer Center, Japan