1. Department of Cellular Neurology, Hertie Institute for Clinical Brain Research, University of Tübingen D‐72076 Tübingen Germany
2. DZNE, German Center for Neurodegenerative Diseases D‐72076 Tübingen Germany
3. Graduate School of Cellular and Molecular Neuroscience, University of Tübingen D‐72074 Tübingen Germany
4. Department of Chemistry, IFM, Linköping University SE‐581 83 Linköping Sweden