1. G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences, 142290 Pushchino, Moscow region, Russia
2. Bioengineering Center, Russian Academy of Sciences, 117312 Moscow, Russia
3. Institute of Microbiology, Russian Academy of Sciences, 117312 Moscow, Russia
4. Department of Applied Chemistry and Microbiology, University of Helsinki, PO Box 56, FIN 00014, Finland