1 Division of Systems Virology, Department of Microbiology and Immunology, The University of Tokyo, Tokyo 113-0033, Japan.
2 Division of Systems Virology, Department of Microbiology and Immunology, The University of Tokyo, Tokyo 113-0033, Japan; Faculty of Liberal Arts, Sophia University, Tokyo, Japan.
3 Division of Systems Virology, Department of Microbiology and Immunology, The University of Tokyo, Tokyo 113-0033, Japan; International Research Center for Infectious Diseases, The University of Tokyo, Tokyo 113-0033, Japan.
4 Division of Systems Virology, Department of Microbiology and Immunology, The University of Tokyo, Tokyo 113-0033, Japan; International Research Center for Infectious Diseases, The University of Tokyo, Tokyo 113-0033, Japan; International Vaccine Design Center, The Institute of Medical Science, The University of Tokyo, Tokyo 113-0033, Japan; Graduate School of Medicine, The University of Tokyo, Tokyo, Japan; Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Japan; Collaboration Unit for Infection, Joint Research Center for Human Retrovirus Infection, Kumamoto University, Kumamoto, Japan; MRC-University of Glasgow Centre for Virus Research, Glasgow, Scotland, UK. Electronic address: KeiSato@g.ecc.u-tokyo.ac.jp.