1 Institute of Cellular Biochemistry, University Medical Center Göttingen, Göttingen, Germany.
2 European Neuroscience Institute Göttingen, A Joint Initiative of the University Medical Center Göttingen and the Max-Planck-Society, Göttingen, Germany.
3 Department of Biology, University of Padova, Padova, Italy.
4 European Neuroscience Institute Göttingen, A Joint Initiative of the University Medical Center Göttingen and the Max-Planck-Society, Göttingen, Germany. imilose@gwdg.de.
5 Institute of Cellular Biochemistry, University Medical Center Göttingen, Göttingen, Germany. nuno.raimundo@med.uni-goettingen.de.