PCK1 and hepatocellular carcinoma: Moreover, correlation analysis revealed that PCK1 protein abundance was positively correlated with H3K9me3 in HCC tumor samples (Figure 9C, r = 0.4092, P = 0.0035), while negative correlations were observed between S100A11 and H3K9me3 (Figure 9D, r = –0.4235, P = 0.0024) and PCK1 (Figure 9E, r = –0.5169, P = 0.0001).