PKNOX1 and hepatocellular carcinoma: The interference efficiency of three siRNA fragments (si-PKNOX1#1, si-PKNOX1#2 and si-PKNOX1#3) was verified via WB, and the best knockdown efficiency siRNA for HCC-LM3 (si-PKNOX1#2) and the best knockdown efficiency siRNA for HepG2 (si-PKNOX1#1) were determined (Figure 10C).