Besides, the box plots derived from gene expression data in Oncomine suggested that the expression of PADI2 gene in ovarian cancer tissue was significantly increased comparing with that in normal tissue (left plot) (Fig. 1b).Furthermore, we searched the Kaplan–Meier plotter database to explore the association between the PADI2 expression level and the prognosis of OC patients. Here, PADI2 is linked to ovarian carcinoma.