TAGAP and pancreatic adenocarcinoma: The correlation between ARHGAP copy number alterations (CNA) and expression of mRNA, as shown in Fig. 2B, indicated a positive correlation between the copy numbers of ARHGAP1, ARHGAP5, ARHGAP35 (GRLF1), ARHGAP42, and ARHGAP47 (TAGAP) and the mRNA expression in PAAD.