Furthermore, 14 of the identified genes (AGT, APOC1, APOE, AXIN2, CEACAM5, ERBB2, HSPA13, ID1, KLK12, MMP9, PPP1R1B, PTPRA, SERPINB5, and SMAD7) have previously been associated with malignant gastric tumors. This evidence concerns the gene PPP1R1B and gastric cancer.