Uracil N-Glycosylase (UNG), also known as uracil-DNA glycosylase, hydrolyzes the N-glycosidic bond between the deoxyribose sugar and uracil in DNA containing deoxyuridine in place of thymidine. UNG is active on both ssDNA and dsDNA that contain uracil, but has no activity on RNA or 2´-deoxyuridine- 5´-monophosphate