1. Institute for Biological Instrumentation, Russian Academy of Sciences, 142290 Pushchino, Moscow Region, Russia, Department of Chemistry and Biochemistry, University of California, Santa Cruz, California 95064, Branch of M. M. Shemyakin and Yu. A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Moscow Region, Russia, and Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygin Str., 117334 Moscow, Russia