Abasic site adenine removal

Base-Excision Repair Every cell has a class of enzymes called DNA glycosylases that recognize particularly common DNA lesions (such as the products of cytosine and adenine deamination see Fig. 8-33a) and remove the affected base by cleaving the Af-glycosyl bond. This cleavage creates an apurinic or apyrimidinic site in the DNA, commonly referred to as an AP site or abasic... 

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