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. 1994 Nov 4;266(5186):814-6.
doi: 10.1126/science.7973637.

DNA loop repair by human cell extracts

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DNA loop repair by human cell extracts

A Umar et al. Science. .

Abstract

An activity in human cell extracts is described that repairs DNA with loops of five or more unpaired bases. Repair is strand-specific and is directed by a nick located 5' or 3' to the loop. This repair is observed in a colorectal cancer cell line that is devoid of a wild-type hMLH1 gene and is deficient in repair of mismatches. However, a cell line with deletions in both hMSH2 alleles is deficient in repair of both loops and mismatches. Defects in loop repair may be relevant to the repetitive-sequence instability observed in cancers and other hereditary diseases.

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Comment in

  • DNA repair comes into its own.
    Marx J. Marx J. Science. 1994 Nov 4;266(5186):728-30. doi: 10.1126/science.7973626. Science. 1994. PMID: 7973626 No abstract available.

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