CDK9 and hepatocellular carcinoma: As shown in Figure 6A and B, overexpression of miR‐206 significantly suppressed the expression of CDK9 at mRNA (Bell7402, P = 0.0417; HepG2, P = 0.0086) and protein levels (Bell7402, P = 0.0082; HepG2, P = 0.0025) in HCC cells.