Affiliation: | 1. Department of Chemistry, Graduate School of Science, Kitasato University, 1‐15‐1 Kitasato, Sagamihara, Kanagawa 252‐0373 (Japan), Fax: (+81)?42‐778‐9925;2. Precursory Research for Embryonic Science (PRESTO), Japan Science and Technology Agency (JST), 4‐1‐8 Honcho, Kawaguchi, Saitama, 332‐0012 (Japan) |