1. Max-Planck-Institute for Molecular Genetics, Department of Vertebrate Genomics, Ihnestraße 73, 14195 Berlin, Germany
2. GBF – National Research Center for Biotechnology, Division of Microbiology, Mascheroder Weg 1, D-38124 Braunschweig, Germany
3. Institute of Microbiology, Russian Academy of Sciences, Prospect 60-Letiya Octyabrya 7, korp 2, Moscow 117811, Russia