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. Author manuscript; available in PMC: 2011 Dec 8.
Published in final edited form as: Chem Rev. 2010 May 5;110(12):7002–7023. doi: 10.1021/cr100023g

Figure 29.

Figure 29

Neutral radical formation from one electron reduced cytosine and thymine bases (R=H, deoxyribose (phosphate)). The water acts as a proton (H+) donor. The site of protonation is shown by pink circle.