1. Department of Cellular Logistics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
2. Bioanalytical Mass Spectrometry Group, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
3. Institute for Clinical Chemistry, University Medical Center Göttingen, Göttingen, Germany
4. Institute for Molecular Biology, University Medical Center Göttingen, Göttingen, Germany