Figure 2. Functional analysis of 33 PRGs in HCC. (A) The enriched signaling pathways of 33 PRGs were obtained from the Metascape database. (B) A PPI network was constructed using the STRING database. (C) A gene-gene interactive network was constructed using the Metascape database. (D) The hub genes were selected from the PPI network using the Metascape database. (E, F) Heatmaps demonstrating the correlations among 33 PRGs with Spearman analysis in the TCGA and ICGC databases.