1. Research Institute; Morinaga and Company Ltd.; 2-1-1 Shimosueyoshi Tsurumi-ku Yokohama 230-8504 Japan
2. Laboratory of Molecular Functions of Food; Division of Food Science and Biotechnology; Graduate School of Agriculture; Kyoto University; Uji Kyoto 611-0011 Japan
3. Research Unit for Physiological Chemistry; Center for the Promotion of Interdisciplinary Education and Research; Kyoto University; Kyoto 606-8502 Japan