1. Department of Biochemistry and Metabolic Science Akita University Graduate School of Medicine 1-1-1 Hondo Akita 010-8543 Japan
2. Department of Biotechnology Faculty of Bioresource Sciences Akita Prefectural University 241–438 Kaidobata-Nishi, Shimoshinjo-Nakano Akita 010–0195 Japan
3. Laboratory of Regulation of Intractable Infectious Diseases National Institutes of Biomedical Innovation, Health and Nutrition 7-6-8 Saito-Asagi Ibaraki, Osaka 567-0085 Japan