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. 1979 Aug;76(8):3746–3750. doi: 10.1073/pnas.76.8.3746

UV-endonuclease from calf thymus with specificity toward pyrimidine dimers in DNA.

E A Waldstein, S Peller, R B Setlow
PMCID: PMC383910  PMID: 40230

Abstract

We describe the partial purification of an endonuclease from calf thymus that nicks phage PM2 DNA irradiated with UV doses producing only a few pyrimidine dimers per molecule. It has much less activity on DNA that has been subjected to enzymatic photoreactivation after UV irradiation. The calf thymus endonuclease is different from other mammalian UV-endonucleases so far described in that it seems to be dimer specific. The enzyme is stimulated by Mg2+ and is inactive in the presence of EDTA. It binds to UV-irradiated DNA-Sepharose from which it is released by low concentrations of KCl. Gel filtration data indicate that the endonuclease may belong to a high molecular weight protein or protein complex. The enzyme is very labile and freezing increases its lability.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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