doi: 10.1016/0005-2744(78)90132-8.
A rapid purification of T4 polynucleotide kinase using Blue Dextran-Sepharose chromatography
- PMID: 214125
- DOI: 10.1016/0005-2744(78)90132-8
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A rapid purification of T4 polynucleotide kinase using Blue Dextran-Sepharose chromatography
Biochim Biophys Acta.
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Abstract
A rapid batch procedure is described for purification of T4 polynucleotide kinase (ATP:5'-dephosphopolynucleotide 5'-phosphotransferase, EC 2.7.1.78) to near homogeneity using Blue Dextran-Sepharose chromatography. The enzyme preparation is sufficiently free of contaminating endonuclease and alkaline phosphatase activities to be suitable for radioactively labeling nucleic acids in vitro. Kinetic measurements indicate that the chromophore of Blue Dextran, Cibacron Blue F3GA, inhibits the activity of T4 polynucleotide kinase competitively with respect to single stranded DNA substrate and non-competitively with respect to the rATP substrate.
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