1Department of Food Science and Nutrition, Nara Womens's University, Kita-Uoya Nishimachi, Nara, Japan, E-mail: akari.minami@yahoo.com
2Department of Microbiology and Immunology and Department of Genome Biology, Graduate School of Medicine, Osaka University, 2-2 Yamada-oka, Suita, Japan, E-mail: akari.minami@yahoo.com