1. MTA-ELTE Research Group of Peptide Chemistry, Eötvös L. University; 1117 Budapest Hungary
2. Department of Chemistry; University of Konstanz; 78457 Konstanz Germany
3. Department of Experimental and Health Sciences; Pompeu Fabra University; 08003 Barcelona Spain
4. Proteomics Facility; Department of Biology, University of Konstanz; 78457 Konstanz Germany
5. Zukunftskolleg, University of Konstanz; 78457 Konstanz Germany