1. Department for NMR-Based Structural Biology; Max Planck Institute for Biophysical Chemistry; Am Fassberg 11 Göttingen 37077 Germany
2. German Center for Neurodegenerative Diseases (DZNE); Von Siebold-Str. 3a Göttingen 37075 Germany
3. Department of Neurology; University Medical Center Göttingen, University of Göttingen; Am Waldweg 33 Göttingen 37073 Germany