Affiliation: | 1. Department of Biology, Faculty of Science, Toho University, 2‐2‐1 Miyama, Funabashi, Chiba 274‐8510, Japan;2. Present address: Department of Basic Science, Graduate School of Arts and Sciences, University of Tokyo, 3‐8‐1 Komaba, Meguro‐ku, Tokyo, 153‐8902, Japan. |