1. Laboratory of Chemical Bioscience, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062
2. Ichihara Research Center, JNC Petrochemical Corporation, 5-1 Goikaigan, Ichihara, Chiba 290-8551