1. Dept. of Marine Biology and Sciences, School of Biological Sciences; Tokai Univ; Sapporo 005-8601 Japan
2. Dept. of Biochemistry; National Cerebral and Cardiovascular Center Research Institute; Suita 565-8565 Japan
3. Dept. of Food Management, School of Food, Agricultural and Environmental Sciences; Miyagi University; Sendai 982-0215 Japan