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Metformin (MET) and buformin (BUF) preferentially inhibit viability of human H460 cancer cells compared to human noncancer Beas-2B cells. Cells growing under RCCs were incubated with the indicated concentrations of drugs for 72 h. Control cells (DMSO) were incubated with equivalent concentration of DMSO. The viability was measured by the MTT assay.
