1. Max-Delbrueck-Center for Molecular Medicine, Berlin, 13125 Berlin, Germany, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts 02129, Department of Medical Biochemistry, University of Aarhus, 8000 Aarhus C, Denmark, Department of Pathology and Centre for Neurosciences, The University of Melbourne, Victoria 3010, Australia, The Mental Health Research Institute of Victoria, Parkville, Victoria 3052, Australia, and Biota Structural Biology Laboratory, St. Vincent's Institute...