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Viability of human cancer cells treated with RL2, dimeric RL2, and RL2Ser for 48 h (MTT assay). (A) A549 cells treated with different RL2 or RL2 dimer concentrations; (B) MDA-MB-231 cells treated with different concentrations of RL2 and RL2Ser. Differences between the means control and experimental groups of MDA-MB-231 cell viability are statistically significant in p < 0.02.
