[1] Univ Tokyo, Dept Biophys & Biochem, Sch Sci, Bunkyo Ku, Tokyo 1130033, Japan
[2] RIKEN, Wako Inst, Biomol Characterizat Team, Adv Dev Supporting Ctr, Wako, Saitama 3510033, Japan
[3] RIKEN, Syst & Struct Biol Ctr, Tsurumi Ku, Yokohama, Kanagawa 2300045, Japan
[4] Univ Tokyo, Dept Chem, Sch Sci, Bunkyo Ku, Tokyo 1130033, Japan
[5] Kyoto Univ, Inst Virus Res, Kyoto 6068507, Japan
[6] RIKEN, Harima Inst, Sayo, Hyogo 6795148, Japan