Abstract
1Department of Microbiology, University of Groningen, NL-9751 NN Haren, The Netherlands
2Lehrstuhl für Mikrobiologie, Technische Universität München, D-8000 Munich, Germany
3Institute of Microbiology, Academy of Sciences, 117811 Moscow
4Institute of Biochemistry and Physiology of Microorganisms, Puschino, Moscow Region Russia
5Public Health Laboratory Service Centre for Applied Microbiology and Research Division of Biotechnology, Porton Down, Salisbury, Wiltshire SP4 0JG, United Kingdom