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Annexin V-FITC PI binding assay for the evaluation of apoptosis for resistant MCF-7 cells. (A) Percentages of apoptosis assays. Cellular death modality by flow cytometry of (B) control resistant MCF-7 cells, (C) resistant MCF-7 cells treated with Dox and (D) resistant MCF-7 cells treated with Dox/quercetin combination. Results present the mean ± standard deviation of at least 2 replicates. *P<0.05, ****P<0.0001. PI, propidium iodide; Dox, doxorubicin.
