1. Martin Luther University Halle-Wittenberg Institute of Physics Betty-Heimann-Straße 7 06120 Halle Germany
2. Martin Luther University Halle-Wittenberg Institute of Biochemistry and Biotechnology Kurt-Mothes-Straße 3 06120 Halle Germany
3. present address: Johannes Gutenberg University Mainz Institute of Chemistry – Biochemistry, Biocenter II Hanns-Dieter-Hüsch-Weg 17 55128 Mainz Germany
4. Martin Luther University Halle-Wittenberg Interdisciplinary Research Center HALOmem Institute of Biochemistry and Biotechnology Kurt-Mothes-Straße 3a 06120 Halle Germany