Materials Chemicals were purchased from commercial suppliers (Thermo Scientific, Merck KGaA, VWR and Honeywell). Solvents and reagents used for peptide synthesis were obtained in peptide grade. Solvents used for peptide purification were of high-performance liquid chromatography (HPLC) grade; dimethyl sulfoxide (DMSO) was BioUltra grade for molecular biology (≥99.5%, Sigma Aldrich); and water was obtained from
