Affiliation: | (1) Tsukuba Life Science Center, The Institute of Physical and Chemical Research (RIKEN), 3-1-1 Koyadai, 305 Tsukuba, Ibaraki, Japan;(2) Department of Cytogenetics, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, 113 Tokyo, Japan |