SOD1 and breast cancer: The proline, CAT, SOD, and POD contents were increased by 46.4% and 62.2%, 61.6% and 74.3%, 32.5% and 45.6%, 41.4% and 51.9% under 1.5% and 3.0% PHCs contamination respectively, over their uncontaminated control (without PHCs and BC).