PCNA and neoplasm: Analysis of the correlation scatter plot of the IHC score showed DPY30 protein level was positively correlated with PCNA (R = 0.6954, P = 0.0040), Ki67 (R = 0.6691, P < 0.0064) and cyclin A (R = 0.7474, P < 0.0014) in subcutaneous xenograft tumor tissues, respectively (Fig. 6F).