1. Center for Functional Protein Assemblies (CPA), Department of Chemistry, Chair of Organic Chemistry II, Technical University of Munich, 85748 Garching, Germany
2. Department of Chemistry, Ludwig-Maximilians-Universität München, 81377 München, Germany
3. Department of Biochemistry and Signal Transduction, University Medical Center Hamburg-Eppendorf (UKE), 20246 Hamburg, Germany
4. Department of Biology I, Microbiology, Ludwig-Maximilians-Universität München, 82152 Martinsried, Germany