1. Max Planck Institute for Marine Microbiology, Bremen, Germany
2. Electron Microscopy Core Facility, EMBL Heidelberg, Heidelberg, Germany
3. Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky University of Oldenburg, Oldenburg, Germany
4. Department of Pharmaceutical Biotechnology, Institute for Pharmacy, University of Greifswald, Greifswald, Germany
5. Max Planck-Genome-Centre Cologne, Cologne, Germany