ABCG2 and cancer: Considering the results of enhanced expression of miR‐548 K due to its transfection in drug‐resistant cancer cells, which led to a decline in the expression of ABCG2 gene in these cells, as well as the results of miR‐548 K and ABCG2 transcript alignment revealing 3 binding site for miR‐548 K on ABCG2 mRNA 3′UTR, the role of miR‐548 k in regulating ABCG2 gene expression was highlighted.