MPP7 and nonpapillary renal cell carcinoma: The CPTAC data showed that MPP7 total protein expression in primary ovarian cancer, clear cell RCC (ccRCC), colon cancer, GBM, HNSC, UCEC, pancreatic adenocarcinoma (PAAD), and hepatocellular carcinoma (HCC) was significantly lower compared to healthy tissues (P < 0.001; Fig. 1C).