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. The gene discussed is PTPRA; the disease is gastric cancer.