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Emphasis is placed in this short review on recent developments concerning several aspects of the chemical and biochemical effects of ionizing radiation on both isolated and cellular DNA. This includes the mechanism of formation of single and tandem DNA lesions upon one-electron oxidation and one hydroxyl radical hit only. Information is also provided on the specificity of DNA repair enzymes and the...
Emphasis is placed in the first part of this survey on mechanistic aspects of the formation of 8-oxo-7,8-dihydroguanine (8-oxoGua) as the result of exposure to OH radical, one-electron oxidants and singlet oxygen ( 1 O 2 ) oxidation. It was found that 8-oxoGua, which is generated by either hydration of the guanine radical cation or OH addition at C8 of the imidazole ring, is a...
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