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Overexpression of miR-497 inhibited colony formation ability of MDA-MB-231 cells. (A) Colony formation assays showed Crystal Violet staining of the miR-497-transfected group and NC-transfected group. (B) Graph indicates colony numbers of each experimental transfected group (60 ± 2 miR-497 group vs. 145 ± 2 NC group, *P < 0.05).
