DNA damage is a ubiquitous part of the cellular life cycle. Oxidative stress is particularly problematic for nucleic acids. In many cases, this stress is initiated by a free radical, commonly the hydroxyl radical (·OH). Hydroxyl radicals are generated by both exogenous agents such as carcinogenic molecules and ionization radiation, as well as endogenous sources. [ 1 1. Halliwell , B. and Gutteridge , JMC 2007. Free Radicals in Biology and Medicine, Oxford, New York: Oxford University ...