Department of NMR-Based Structural Biology, Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany, Structural Biology in Dementia, German Center for Neurodegenerative Diseases (DZNE), 37077 Göttingen, Germany and Center for Nanoscale Microscopy and Molecular Physiology of the Brain, University Medical Center Göttingen (UMG), 37075 Göttingen, Germany Department of NMR-Based Structural Biology, Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany, Structural Biology in Dementia, German Center for Neurodegenerative Diseases (DZNE), 37077 Göttingen, Germany and Center for Nanoscale Microscopy and Molecular Physiology of the Brain, University Medical Center Göttingen (UMG), 37075 Göttingen, Germany.