1. The
Institute of Scientific and Industrial Research, Osaka University, Mihogaoka
8-1, Ibaraki, Osaka 567-0047, Japan
2. Department
of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
3. Molecular
and Cellular Physiology, Graduate School of Medicine, Kyoto University, Kyoto 606-8561, Japan
4. Department
of Microbiology and Immunology, State University of New York at Buffalo, Buffalo, New York 14214, United States
5. Department
of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan