1. Division of Food Science, Incorporated Administrative Agency, National Institute of Health and Nutrition, 1–23-1 Toyama, Shinjuku-ku, Tokyo 162-8636, Japan
2. Japan Society for the Promotion of Science, Tokyo 102-8471, Japan
3. Department of Bioresource Science, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido 080-8555, Japan