1. Leiden Institute of Chemistry; Dept. of Bio-organic Synthesis; Leiden University; Einsteinweg 55 2333 CC Leiden The Netherlands
2. Department of Physiological Chemistry, Biomedical Center; Faculty of Medicine; Ludwig-Maximilians-Universität München; Großhaderner Street 9 82152 Planegg-Martinsried Germany
3. Center for Integrated Protein Science Munich (CIPSM); Ludwig-Maximilians-Universität München; Butenandt Street 5 81377 Munich Germany
4. Munich Cluster for Systems Neurology (SyNergy); Ludwig-Maximilians-Universität München; Feodor Lynen Street 17 81377 Munich Germany