1. Department of Biochemistry, Kumamoto University Medical School, Honjo, Kumamoto 860-0811, Japan
2. Graduate School of Genetic Resources Technology, Kyushu University, Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
3. Department of Complexity Science and Engineering, Graduate School of Frontier Sciences, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
4. Department of Bacteriology, Kinki University School of Medicine, Osaka-Sayama, Osaka 589-8511, Japan
5. Laboratory of Genetic Resources, National Institute of Infectious Diseases, Toyama, Shinjuku-ku, Tokyo 162-8640, Japan