1. Laboratory of Microbiology Wageningen University & Research Wageningen 6708 WE The Netherlands
2. Department of Microbiology, IWWR Radboud University Heyendaalseweg 135 Nijmegen 6525 AJ The Netherlands
3. Soehngen Institute of Anaerobic Microbiology, Heyendaalseweg 135 Nijmegen 6525 AJ The Netherlands
4. Sub‐department of Environmental Technology Wageningen University & Research, Bornse weilanden 9 Wageningen 6708 DW The Netherlands
5. Department of Civil and Environmental Engineering University of Michigan, 1351 Beal Avenue Ann Arbor MI 48109‐2125 USA
6. Nordic Center for Earth Evolution University of Southern Denmark Odense DK‐5230 Denmark
7. Architecture et Fonction des Macromolécules Biologiques (AFMB), CNRS, 163 avenue de Luminy 13288 Aix Marseille Université Marseille France
8. Department of Biology University of Konstanz Konstanz 78457 Germany
9. Centre of Biological Engineering University of Minho, Campus de Gualtar Braga 4710‐057 Portugal