1. Laboratory of Gene Function; Kazusa DNA Research Institute; 2-6-7 Kazusa-kamatari Kisarazu Chiba 292-0818 Japan
2. Department of Biophysics and Biochemistry; Graduate School of Science; University of Tokyo; 7-3-1 Hongo Tokyo 113-0033 Japan
3. Department of Life Science and Medical Bioscience; Graduate School of Advanced Science and Engineering; Waseda University-TWIns; 2-2 Wakamatsucho Shinjuku Tokyo 162-8480 Japan
4. Laboratory of Cell Response; National Institute for Basic Biology; Nishigonaka 38 Myodaiji Okazaki Aichi 444-8585 Japan