DNA strand breaks containing 3'-phosphoglycolate (3'-PG) ends are the major lesions induced by ionizing radiation. The repair of this lesion is not completely understood and several activities are thought to be involved in processing of 3'-PG ends. In this study we examined activities in human whole cell extracts (WCE) responsible for removal of 3'-PG. Using a radiolabelled oligonucleotide containing a single nucleotide gap with internal 5'-phosphate and 3'-PG ends, we demonstrate that the ma...Expand abstract
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APE1 is the major 3'-phosphoglycolate activity in human cell extracts.
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