The mRNA expression data from the UALCAN database revealed that the expression of CBX1/2/3/4/5/8 was significantly upregulated in the STAD tissues compared to the normal tissues, while the expression of CBX6/7 was markedly downregulated (Figure 2(a); please see the Supplementary 1 for primary data). The gene discussed is CBX6; the disease is gastric adenocarcinoma.