1. Biotechnology Frontier Project, Toyobo Co., Ltd., 10-24 Toyo-cho, Tsuruga, Fukui 914-0047, Japan, Chiba Industry Advancement Center, 2-6 Nakase, Mihama-ku, Chiba 261-7126, Japan, and Kazusa DNA Research Institute, 2-6-7 Kazusa-Kamatari, Kisarazu Chiba 292-0818, Japan