1. Laboratory of Nutritional Biochemistry, School of Food and Nutritional Sciences, The University of Shizuoka, Yada, Shizuoka 422, Japan
2. Laboratory of Nutritional Biochemistry, Department of Home Economics, Aichi University of Education, Kariya, Aichi 448, Japan
3. Laboratory of Nutritional Biochemistry, Department of Agricultural Biological Chemistry, Nagoya University, Nagoya, Aichi 464-01, Japan