Supplementary Table 1 summarizes the studies on gastric cancer. CBX1/2/3/4/6 were significantly up-regulated in different gastric adenocarcinoma types, whereas CBX7 was significantly down-regulated in diffuse gastric adenocarcinoma. These findings are in line with observation in different cancer types, which indicates the conserved function of the CBXs family among various tumor types. This evidence concerns the gene CBX7 and cancer.