Affiliation: | (1) Department of Applied Biological Chemistry, Division of Agriculture and Agricultural Life Sciences, University of Tokyo, Bunkyo-ku, 113 Tokyo, Japan;(2) Department of Molecular Biology, National Institute of Agrobiological Resources, Kannondai, Tsukuba, 305 Ibaraki, Japan;(3) Present address: Biotechnology Research Laboratories, Takara Shuzo Co., Ltd., Seta, Otsu, 520-21 Shiga, Japan |