1. Novosibirsk Institute of Bioorganic Chemistry, Siberian Division of the Russian Academy of Sciences, Lavrentiev Avenue 8, Novosibirsk 630090, Russia, Novosibirsk State University, Pirogova street 2, Novosibirsk 630090, Russia, and EP 630, CNRS-Université Victor Segalen Bordeaux 2, IFR 66 “Pathologies Infectieuses”, 1 rue Camille Saint-Saëns, 33077 Bordeaux Cedex, France