In Series 1 and 2, similar to hemolysis data, 7a, 12a, 7b, and 12b showed a significant improvement in cytotoxicity against all four types of normal mammalian cells compared to the parent peptides (p1 and p2) (Figures ). For instance, at 150 µg/mL, 30-35% cell viability was observed for control peptides p1 and p2 against lung cells, whereas peptides 7a, 12a, 7b, and 12b showed twofold improvement, with 61-70% cell viability.