〇Hideaki Kubotera¹, Osamu Kutomi², Sen Takeda², Hiroko Ikeshima-Kataoka¹, Takafumi Inoue¹ (1.Dept. Life Sci. & Med. Biosci., Waseda Univ., Tokyo, Japan, 2.Dept. Anat. & Cell Biol., Univ. Yamanashi, Yamanashi, Japan)