May play a role in the regulation of cellular reactive oxygen species metabolism. May participate in cell growth regulation (By similarity). Interacts with UNG. Expressed at high levels in stomach and also in kidney and, at low levels, in heart (at protein level). In the stomach, highly expressed in foveolar cells, parietal cells and chief cells (at protein level). In kidney, expressed in endothelial cells, mesangial and epithelial cells (parietal and visceral epithelium) around glomerulus (at protein level). Belongs to the FAM72 family.