1. Division of Mammalian Development, National Institute of Genetics, SOKENDAI, Yata 1111, Mishima, Shizuoka 411-8540, Japan. Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Corporation, 2-6-15, Shibakoen, Minato-ku, Tokyo 105-0011, Japan. RIKEN, Bio-Resource Center, 3-1-1 Koyadai, Tsukuba-shi, Ibaraki 305-0074, Japan. Department of Microbiology, Shiga University of Medical Science, Seta, Otsu-shi, Shiga 520-2192, Japan. Center for Integrative Bioscience,...