1. Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel
2. Institute for Neuropathology, Georg August Universität Göttingen, Göttingen, Germany
3. Cluster of Excellence “Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells,” University of Göttingen, Göttingen, Germany
4. Interfaculty Institute of Biochemistry, University of Tuebingen, Tuebingen, Germany
5. Electron Microscopy Unit, Chemical Research Support, Weizmann Institute of Science, Rehovot, Israel