1. Microbiology Group, Institute of Life Sciences, Ajinomoto Co., Inc., 1-1 Suzuki-cho, Kawasaki-ku, Kawasaki, 210-8681, Japan
2. Department of Ecological Engineering, Toyohashi University of Technology, Tenpaku-cho, Toyohashi, 441-8580, Japan
3. Medicinal Science Division, Korea Research Institute of Chemical Technology, P. O. Box 107, Yusong, Daejon, 305-600, Korea
4. Experimental Farm, Faculty of Textile Science and Technology, Shinshu University, Ueda, 386-8567, Japan