Institution: | 1. Department of Biophysics and Biochemistry, Faculty of Science , University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113, Japan;2. Department of Biophysics and Biochemistry, Faculty of Science , University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113, Japan;3. Protein Engineering Research Institute , Furuedai, Suita, Osaka 565, Japan |