1. Department of Chemistry and Pharmacy Institute of Biochemistry, University of Münster Corrensstrasse 36 48149 Münster Germany
2. Department of Biology and Center for Cellular Nanoanalytics University of Osnabrück Barbarastrasse 11 49076 Osnabrück Germany
3. Institute of Molecular Cell Biology University of Münster Schlossplatz 5 48149 Münster Germany