1. Institute of Chemistry; St. Petersburg State University; St. Petersburg 198504 Russia
2. Laboratory of Peptide and Protein Chemistry and Biology, Department of Chemistry "Ugo Schiff"; University of Florence; 50019 Sesto Fiorentino Italy
3. CNR Istituto di Biostrutture e Bioimmagini; 95126 Catania Italy
4. Laboratory of Peptide and Protein Chemistry and Biology, Department of NeuroFarBa; University of Florence; 50019 Sesto Fiorentino Italy
5. CNR-ICB, Padova Unit, Department of Chemistry; University of Padova; 35131 Padova Italy
6. PeptLab@UCP Platform and Laboratory of Chemical Biology EA4505; University Paris-Seine; 95031 Cergy-Pontoise CEDEX France