1. Max Planck Institute Biochemistry, Am Klopferspitz 18, 82152 Martinsried, Germany
2. Biomolecular
NMR and Munich Center for Integrated Protein Science, Department Chemie, Technische Universität München, 85747 Garching, Germany
3. Institute of Structural Biology, Helmholtz Zentrum München, 85764 Neuherberg, Germany