Institution: | 1. Department of Microbiology, National Institute of Hygiene Sciences, Kamiyoga 1-18-1, Setagaya-ku, Japan;2. Department of Microbiology, Food and Drug Safety Center, Hadano, Kanagawa-ken, Japan;3. Department of Induced Mutation, National Institute of Genetics, Mishima, Shizuoka-ken, Tokyo, Japan |