1. Department of Applied Biological Chemistry, Faculty of Agriculture, Tohoku University, 1-1 Tsutsumidori, Amamiyamachi, Aoba-ku, Sendai 981, Japan
2. Kanesa Company, Ltd., 202 Hamada, Tamagawa, Aomori 030, Japan
3. Nestle Japan, Ltd., 1-16, 7-Chome, Goko-Dori, Chuo-ku, Kobe 651, Japan