1. Institute for Organic Chemistry and Chemical Biology, Goethe University Frankfurt and Center for Biomolecular Magnetic Resonance (BMRZ), 60438 Frankfurt, Germany
2. Institute for Molecular Biosciences, Goethe University Frankfurt and Center for Biomolecular Magnetic Resonance (BMRZ), 60438 Frankfurt, Germany
3. Department of Biology, Technical University of Darmstadt, Darmstadt 64287, Germany
4. Institute of Structural Biology, Helmholtz-Zentrum München, 85764 Neuherberg, Germany
5. Institute of Pharmaceutical Biotechnology, Ulm University, 89081 Ulm, Germany