1. Department of Food, Life and Environmental Science, Faculty of Agriculture, Yamagata University , Tsuruoka, Yamagata , Japan
2. Laboratory of Food and Nutritional Science, Graduate School of Agricultural Science, Yamagata University , Tsuruoka, Yamagata , Japan
3. Laboratory of Biochemistry and Molecular Biology, Department of Medical Technology, Faculty of Medicine, Niigata University , Chuo-ku, Niigata , Japan