1. Okinawa Institute of Science and Technology Graduate University Molecular Cryo-Electron Microscopy Unit, , Onna-son, Okinawa, Japan
2. Winogradsky Institute of Microbiology, Research Center of Biotechnology of the Russian Academy of Sciences , Moscow, Russia
3. Moscow Lomonosov University Department of Biology, , Moscow, Russia
4. N.N.Semenov Federal Research Center for Chemical Physics , Russian Academy of Sciences, Moscow, Russia