PRDX6 and hepatocellular carcinoma: Among them, PRDX1 (Fig. 2a), PRDX2 (Fig. 2b), PRDX5 (Additional file 2: Figure S2C) and PRDX6 (Additional file 2: Figure S2D) were significantly upregulated in HCC while PRDX4 (Additional file 2: Figure S2B) was downregulated.