1. Adolf Butenandt‐Institute, Department of Biochemistry, Laboratory for Alzheimer's and Parkinson's Disease Research, Ludwig‐Maximilians‐University Schillerstrasse 44 80336 Munich Germany
2. Boehringer Ingelheim Pharma KG, Chemical Research 55216 Ingelheim Germany
3. Center for Molecular Biology Heidelberg Im Neuenheimer Feld 282 69120 Heidelberg Germany
4. Department of Neurology, Harvard Medical School, and Center for Neurologic Diseases, Brigham and Women's Hospital Boston MA 02115 USA