1. Institute of Chemistry and Biochemistry, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany
2. Institute of Chemistry and Biochemistry, Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
3. Institute of Chemistry and Biochemistry, Research Center of Electron Microscopy, Freie Universität Berlin, Berlin 14195, Germany