Institution: | (1) Institute of Molecular and Cellular Biosciences, University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo 113-0032, Japan E-mail: mumeda@imcbns.iam.u-tokyo.ac.jp; Fax: +81-3-5841-8466, JP;(2) National Institute of Agrobiological Resources, Tsukuba, Ibaraki 305-0856, Japan, JP;(3) Advanced Science Research Center, Japan Atomic Energy Research Institute, Takasaki 370-1292, Japan, JP |