1. Food Science Research Institute, Fuji Oil Company, Ltd., 1 Sumiyoshi-cho, Izumisano City, Osaka 598-8540, Japan; Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan; and Department of Nutritional Science, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-0054, Japan