1. Department
of Organic Chemistry, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium
2. Laboratory
of Chemical Biology, Biological Research Centre of the Hungarian Academy of Sciences, Temesvári, krt. 62, H-6726 Szeged, Hungary
3. The
Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
4. Mossakowski Medical Research Centre Polish Academy of Sciences, Warsaw, Poland
5. Laboratory
of Chemical Biology and Peptide Research, Clinical Research Institute of Montreal, Montreal, QC H2W
1R7, Canada
6. Tufts University School of Medicine, Boston, Massachusetts 02111, United States