Affiliation: | Division of Molecular Genetics, Center for Biomedical Science, Chiba University School of Medicine 1–8–1 Inohana, Chuo-ku, Chiba 260, Japan 1 Department of Genetics, Institute for developmental research Aichi Prefectural Colony, 713-8 Kamiya-cho, Kasugai, Aichi 480-03, Japan |