1. University of Applied Sciences Lübeck, Mönkhofer Weg 239, 23562 Lübeck, Germany
2. European Molecular Biology Laboratory (EMBL), Hamburg Outstation c/o DESY, Notkestr. 85, 22607 Hamburg, Germany
3. Physics Institute, University of Lübeck, Ratzeburger Allee 160, 23562 Lübeck, Germany
4. Department of Chemistry and Molecular Biology, University of Gothenburg, 41390 Gothenburg, Sweden