1. Isolation and Purification Technology Laboratory, Fermentation and Biotechnology Laboratories, Ajinomoto Company, Inc., 1-1 Suzuki-cho, Kawasaki-ku, Kawasaki-shi, 210-8681 Japan, Institute of Life Sciences, Ajinomoto Company, Inc., 1-1 Suzuki-cho, Kawasaki-ku, Kawasaki-shi, 210-8681 Japan, and Department of Chemical Engineering, Iwate University, 4-3-5 Ueda, Morioka, 020-8551 Japan