We screened the protein expression of Bcl-2, Bcl-xL, and Mcl-1 in Huh7, PLC/PRF/5 and Tong/HCC cells and also found that Bcl-xL and Mcl-1 were highly expressed in Huh7, PLC/PRF/5 and Tong/HCC whereas Bcl-2 was barely undetectable (Supplementary Figure S4). This evidence concerns the gene MCL1 and hepatocellular carcinoma.