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(A) MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay results of the paclitaxel treatment of MDA-MB-468 cells for 48 h; (B) representative photograph of the colony formation assay of epithelial and drug-treated epithelial cells; (C) comparison of the number of colonies formed by the paclitaxel-treated epithelial, EMT, and MET cells with their respective controls; (D) real-time PCR assay results showing MDR-1 expression in epithelial, EMT, and MET cells.
