1. Institute of Medical Microbiology and Hospital Hygiene, Heinrich Heine University, Duesseldorf, Germany
2. Institute of Complex Systems: Structural Biochemistry, Forschungszentrum Juelich, Juelich, Germany
3. Institute of Theoretical and Computational Chemistry, Heinrich Heine University, Duesseldorf, Germany
4. Institute of Biochemistry, Heinrich Heine University, Duesseldorf, Germany
5. Center for Structural Studies, Heinrich Heine University, Duesseldorf, Germany