SOD2 and colorectal cancer: Figure 2 (upper panel) illustrates a colorectal cancer case where no 8-oxo-dG cytoplasmic staining is detected (no red staining) but abundant cytoplasmic MnSOD staining is evident (green). In contrast, Figure 2 (lower panel) shows co-localisation of cytoplasmic 8-oxo-dG and MnSOD staining (yellow).