1. Div. of Food Science and BiotechnologyGraduate School of Agriculture, Kyoto Univ Gokasho Uji, Kyoto 611‐0011 Japan
2. Research & Development DivGlico Nutrition Co., Ltd 4‐6‐5, Utajima Nishiyodogawa‐ku Osaka 555–8502 Japan
3. Dept. of Foods and Human NutritionFaculty of Human Life Sciences, Notre Dame Seishin Univ 2‐16‐9, Ifuku‐cho Kita‐ku Okayama 700–8516 Japan