1. Institute for Biology-Microbiology, Freie Universität Berlin, Berlin, Germany.
2. Center for Biotechnology, Bielefeld University, Bielefeld, Germany.
3. Centre for Infection Medicine, Institute of Microbiology and Epizootics, Freie Universität Berlin, Berlin, Germany.
4. Institute for Microbiology, Ernst-Moritz-Arndt-University of Greifswald, Greifswald, Germany.
5. Laboratory of Structural Biochemistry, Freie Universität Berlin, Berlin, Germany.
6. Institute of Chemistry and Biochemistry, Freie Universität Berlin, Berlin, Germany.