1. Department of Chemistry, Graduate School of Science and Technology, Kwansei Gakuin University, Sanda 669-1330, Japan
2. Department of Biotechnology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan
3. Collaborative Research Institute for Innovative Microbiology, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan