1. Department of Biology/Chemistry, Biochemistry Section, Osnabrück University, Osnabrück, Germany
2. Department of Biology, University of Fribourg, Chemin du Musée, Fribourg, Switzerland
3. Center of Cellular Nanoanalytic Osnabrück (CellNanOs), Osnabrück University, Osnabrück, Germany
4. Department of Biology/Chemistry, Biophysics Section, Osnabrück University, Osnabrück, Germany
5. Department of Biology/Chemistry, Molecular Membrane Biology Section, Osnabrück University, Osnabrück, Germany