1. Department of Physics, Biology and Informatics, Faculty of Science, and Department of Biological Chemistry, Faculty of Agriculture, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8512, Japan, Department of Biotechnology, Faculty of Engineering, Kansai University, Suita, 564-8680 Osaka, Japan, and Mitsui Norin Company Limited, 3-2-11 Nishishinjuku, Shinjuku-Ku, Tokyo 160-8381, Japan