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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

The repair patch of E. coli (A)BC excinuclease.

The size of repair patch made by E. coli DNA polymerase I (Poll) following the removal of a thymine-psoralen monoadduct by E. coli (A)BC excinuclease was determined by using an M13mp19 DNA with a single psoralen monoadduct at the polylinker region. Incubation of this substrate with (A)BC excinuclease, Poll and a combination of 3 dnTP plus 1 dNTP(alpha S) for each nucleotide, and DNA ligase resulted in a repair patch with phosphorothioate linkages. The preferential hydrolysis of phosphorothioate bonds by heating in iodoethanol revealed a patch size--with minimal nick translation--equal in length to the 12 nucleotide gap generated by this excision nuclease.[1]


  1. The repair patch of E. coli (A)BC excinuclease. Sibghat-Ullah, n.u.l.l., Sancar, A., Hearst, J.E. Nucleic Acids Res. (1990) [Pubmed]
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