The peptides were added to each well in triplicates at a variable concentration of 12.5-250 µg/mL and incubated for 24 h at 37 °C in a humidified atmosphere of 5% CO2. After the incubation period, MTS solution (20 µL) was added to each well. Then the cells were incubated for 2 h at 37 °C. Cell viability was determined by measuring the absorbance at 490 nm using a SpectraMaxM2 microplate spectrophotometer. The percentage of cell survival was calculated as [(OD value of cells treated with the test mixture of compounds)-(OD value of culture medium)]/[(OD value of control cells)-(OD value of culture medium)]× 100%.