Peptides were synthesized by solid phase peptide synthesis (SPPS) using semiautomated peptide synthesizer Millipore 9050 Plus PepSynthesizer (Millipore Corporation, Burlington, VT, USA) and general conditions of solid-phase synthesis . Synthesis was performed on a TentaGel R RAM resin (0.19 mmol/g), using 9-fluorenylmethoxycarbonyl/tert-butyl (Fmoc/tBu) chemistry with the following side chain protected amino acid derivatives: Fmoc-Pro-OH, Fmoc-Glu(OtBu)-OH, Fmoc-Cys(Trt)-OH, Fmoc-Val-OH, Fmoc-Ala-OH, Fmoc-Gly-OH, Fmoc-Thr(tBu)-OH, Fmoc-Leu-OH, Fmoc-Lys(Boc)-OH, Fmoc-Arg(Pbf)-OH and Fmoc-Tyr(tBu)-OH. Acetylation of the N-terminal amino group was performed using 1-acetylimidazole (1.10 g/1 g of resin at room temperature for 24 h). The peptide was cleaved from the resin for 2 h using a mixture of 88% TFA, 5% fenol, 5% deionized water and 2% triisopropylsilane (10 ml/1 g of resin at room temperature for 2 h). After filtration of the exhausted resin, solution was concentrated in vacuum, and the residue was triturated with Et2O. The precipitated peptide was centrifuged for 15 min, 4000 rpm, followed by decantation of the ether phase from the crude peptide (process was repeated three times). After evaporation of Et2O, the peptide was dissolved in H2O and lyophilized.