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As the most readily oxidized of DNA’s four natural bases, guanine is a prime target for attack by reactive oxygen species (ROS) and transition metal-mediated oxidants. The oxidation products of a modified guanosine nucleoside and of a single-stranded oligodeoxynucleotide, 5′-d(TTTTTTTGTTTTTTT)-3′ have been studied using oxidants that include Co II , Ni II , and Ir IV compounds...
A series of manganese(II) and manganese(III) salts and oxides were investigated for their ability to catalyze the autoxidation of sulfite resulting in oxidative damage to DNA. Experiments directed at identifying the reactive intermediates responsible for DNA oxidation included the trapping of a sulfite radical adduct during EPR studies, alcohol quenching studies of free radical intermediates, comparisons...
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