The presented results indicate that L. squarrosulus peptide may provide chemosensitizing activity against wild-type and mutant lung cancer cells through inhibition of integrins as demonstrated by the peptide’s effects on H460 (p53 and KRas wild-type), H292 (p53 wild-type), H23 (p53 and KRas mutant) and A549 (KRas mutant) (Figs. 3, 6, 7). Here, KRAS is linked to lung cancer.