1. Graduate School of Science and Technology, and Department of Chemistry and Chemical Engineering, Faculty of Engineering, Niigata University, 2-8050 Ikarashi, Niigata 950-2181, Japan, and Department of Bioengineering, Research Center for Experimental Biology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8501, Japan