The fluorescence intensity percentage of the peptides were performed by preparing solutions of the peptides (0.1 mM) in phosphate buffer (pH 7.4, 1 mM). The fluorescence intensity percentage of the oxidized or reduced state of pep1 were performed by preparing solutions of pep1 (0.1 mM) mixed accordingly with CuCl2, NaIO4, and NaBH4 (0.1 mM). The excitation wavelength in all measurements was set to 365 nm. All measurements were performed using a Biotek Synergy H1 plate reader (Lumitron). The results were compared using one-way analysis of variance (ANOVA) test with Tukey-Kramer post hoc analysis. Statistically significant results were marked with an asterisk.