YY1 and hepatocellular carcinoma: Similar expression patterns of CP2 family, CP2c, and YY1 proteins were also observed both in western blot and in reverse transcriptase-quantitative PCR (RT-qPCR) analyses of the two selected HCC samples in the tissue array, along with the matched ADJ noncancerous liver tissues derived from the same patients and two non-matched normal liver samples (Supplementary Figure 1).