1. Department of Life Science and Frontier Collaborative Research Center, Tokyo Institute of Technology, CREST, JST (Japan Science and Technology Corporation), Nagatsuda, Midoriku, Yokohama 226-8501, Japan, Antibiotics Laboratory, The Institute of Physical and Chemical Research (RIKEN), 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan, and Cancer Research Institute, Kanazawa University, Takara-machi, Kanazawa 920-8640, Japan