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Overexpression of miR-497 inhibited colony formation ability of MDA-MB-231 cells. A. Crystal violet stained colonies from the colony formation assay for the miR-497 mimics group, miRNA NC group, and miR-497 inhibitor group. B. Cells transfected with miR-497 mimics exhibited fewer colonies than the NC group; cells transfected with miR-497 inhibitor exhibited higher numbers of colonies than the NC group (P<0.05).
