1. Laboratory of Microbiology, Wageningen University, Stippeneng 4, 6708 WE Wageningen, The Netherlands
2. Department of Applied and Ecological Microbiology, Friedrich-Schiller-University Jena, Philosophenweg 12, 07743 Jena, Germany
3. Laboratory for Environmental Biotechnology, ENAC-IIE-LBE, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 6, CH-1015 Lausanne, Switzerland
4. U.S. Department of Energy Joint Genome Institute, Walnut Creek, CA 94598, USA
5. Institute of Biology/Microbiology, Martin-Luther-Universität Halle-Wittenberg, Kurt-Mothes-Str. 3, Halle 06120, Germany
6. Research Programme Unit Immunobiology, Department of Bacteriology and Immunology, Helsinki University, P.O. Box 21, 00014 Helsinki, Finland