PRDX2 and breast carcinoma: Using a proteomic approach, we could show that several antioxidant proteins, for example, SOD1, PRDX2, and PARK7, were downregulated in the normo-sensitive patients and some antioxidant proteins, for example, BLVRB and PRDX2, were upregulated in the radiosensitive breast cancer patients [16, 25].