1 Berlin University of Technology, Department Applied and Molecular Microbiology, Institute of Biotechnology, Gustav-Meyer-Allee 25, 13355 Berlin, Germany. Electronic address: vera.meyer@tu-berlin.de.
2 Jacobs University Bremen gGmbH, Department of Life Sciences and Chemistry, Campus Ring 1, 28759 Bremen, Germany. Electronic address: e.nevoigt@jacobs-university.de.
3 University of Wisconsin-Madison, Department of Medical Microbiology & Immunology, 1550 Linden Drive, Madison, WI 53706, USA. Electronic address: pwiemann@wisc.edu.