1. Institute of Biology/Microbiology , 10115 Berlin, Germany
2. Excellence Cluster Matters of Activity , Humboldt-Universität zu Berlin, 10115 Berlin, Germany
3. Department of General Microbiology, Institute of Microbiology and Genetics, Georg-August-Universität Göttingen , 37077 Göttingen, Germany
4. Institute of Microbiology, Leibniz-Universität Hannover , 30419 Hannover, Germany
5. Max Planck Unit for the Science of Pathogens , 10115 Berlin, Germany