Finally, through a combination of bioinformatics analysis of public datasets and mass spectrometry assay analysis of clinical tissue samples, we identified differential expression of ANGPTL6, TTC36, SLC27A5, ADH4, PHYHD1, MBL2, GYS2, CYP2C9, CLEC4M, and CLEC4G between HCC tissues and adjacent nontumorous tissues at the transcriptional and protein levels. The gene discussed is CYP2C9; the disease is hepatocellular carcinoma.