1. Department of Biology, Laboratory for Microbiology; Philipps-University Marburg, Karl-von-Frisch-Str. 8; Marburg D-35043 Germany
2. Interfaculty Institute of Genetics and Functional Genomics, Department Functional Genomics; University Medicine Greifswald, Friedrich-Ludwig-Jahn-Str. 15; Greifswald D-17475 Germany
3. LOEWE-Center for Synthetic Microbiology; Philipps-University Marburg, Hans-Meerweinstr. 6; Marburg D-35043 Germany