TAP1 and cancer: Overexpression of TAP1 gene in cancer patient compared to normal tissue was most in stage 2 for LUAD (p = 3.37e-09) and LIHC (p = 2.97e-08) cancer, stage 2 (p = 1.62e-12) and stage 4 (p = 1.08e-03) were among the highest for BRCA.