As shown in Figure 4A and B, transfection with miR‐206 significantly suppressed the expression of Mcl‐1 in HCC cells (Bell7402, P = 0.0026; HepG2, P = 0.0197), which were also rescued by cotransfection of miR‐206 inhibitor (Bell7402, P = 0.0103; HepG2, P = 0.0125) (Fig. 4A) or GV230‐CDK9 (Bell7402, P = 0.0272; HepG2, P = 0.0098) (Fig. 4B). The gene discussed is MCL1; the disease is hepatocellular carcinoma.