1. Department of Medical Biochemistry School of Pharmaceutical Sciences University of Shizuoka 52‐1 Yada, Suruga‐ku, Shizuoka Shizuoka 422‐8526 Japan
2. School of Pharmaceutical Sciences University of Shizuoka 52‐1 Yada, Suruga‐ku, Shizuoka Shizuoka 422‐8526 Japan