1. Novosibirsk Institute of Bioorganic Chemistry, Siberian Division of the Russian Academy of Sciences, 630090 Novosibirsk, Lavrentiev av. 8, Russia, Novosibirsk State University, Pirogova av. 2, 630090 Novosibirsk, Russia, and Engelhard Institute of Molecular Biology, Russian Academy of Sciences, Vavilova av. 32, 117984 Moscow, Russia