1. 12nd Department of Biochemistry, School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, Nishinomiya, Japan
2. 2Department of Biochemical Engineering, Graduate School of Science and Engineering, Yamagata University, Yonezawa, Japan
3. 3Department of Infection Microbiology, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
4. 4Division of Bacteriology, International Research Center for Infectious Diseases, Institute of Medical Science, The University of Tokyo, Tokyo, Japan