1. Department of Protein Engineering, Cancer Institute, Japanese Foundation for Cancer Research, Toshima, Tokyo 170-8455, Japan, Laboratory for Chemical Physics, New York University, New York, New York 10010, NEC, Miyukigaoka, Tsukuba 305-8501, Japan, SORST, JST, c/o NEC, Meijo University, Tenpaku, Nagoya 468-8502, Japan, AIST, Higashi, Tsukuba 305-8565, Japan, and CREST, JST, c/o Cancer Institute