1. Division of Biochemistry, National Institute of Health Sciences, 3-25-26, Tonomachi, Kawasaki-ku, Kawasaki-shi210-9501, Kanagawa, Japan
2. Food and Agricultural Materials Inspection Center: Saitama Shintoshin National Government Building, Kensato Building 2-1, Shintoshin, Chuo-ku, Saitama-Shi330-9731, Saitama, Japan
3. National Agriculture and Food Research Organization, 2-1-12 Kannondai, Tsukuba305-8642, Ibaraki, Japan