1. Max Planck Institute for Solid State Research; Heisenbergstrasse 1 70569 Stuttgart Germany
2. Department of New Materials and Biosystems; Max Planck Institute for Intelligent Systems; Stuttgart 70569 Germany
3. Department of Biophysical Chemistry; University of Heidelberg; Heidelberg 69120 Germany
4. Department of Chemistry; University of Munich (LMU); Butenandtstrasse 5-13 81377 Munich Germany
5. Center for Integrated Protein Science (CIPSM) at the Department of Chemistry; University of Munich (LMU); Butenandtstrasse 5-13 81377 Munich Germany