Affiliation: | 1. Department of Biology, Faculty of Science, Osaka University, Toyonaka, Osaka 560 Japan;2. Laboratory of Biochemistry, Aichi Cancer Center Research Institute, Chikusa-Ku, Nagoya 646 Japan;3. Laboratory of Experimental Radiology, Aichi Cancer Center Research Institute, Chikusa-Ku, Nagoya 646 Japan;4. Department of Biology, College of General Education, Osaka University, Toyonaka, Osaka 560 Japan |