1. Department of Molecular Biology, Max Planck Institute of Biochemistry, and Center for Integrated Protein Science Munich (CIPSM), Am Klopferspitz 18, 82152 Martinsried, Germany
2. Institute of Organic Chemistry, University of Leipzig, Johannisallee 29, 04103 Leipzig, Germany
3. Research Group NMR Spectroscopy, Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152 Martinsried, Germany
4. Chemical Genomics Research Group, Max Planck Institute of Psychiatry, Kraepelinstrasse 2, 80804 Munich, Germany