ATP6AP2 and pancreatic adenocarcinoma: Additionally, (P) RR expression was higher in human PDAC cell lines compared to that in normal pancreatic epithelial cells [11].To further analyze related information in big data, we have compared the levels of ATP6AP2 transcripts in tumor tissues of pancreatic adenocarcinoma (PAAD) and normal pancreatic tissues, based on the data provided in the TCGA and GTEx databases.