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Analysis and optimization of recombinant DNA joining reactions

Identifieur interne : 004E10 ( Main/Exploration ); précédent : 004E09; suivant : 004E11

Analysis and optimization of recombinant DNA joining reactions

Auteurs : Randy J. Legerski [États-Unis] ; Donald L. Robberson [États-Unis]

Source :

RBID : ISTEX:2CAB1FD8D9F9922E80247480BFFAF299AD5A37FB

English descriptors

Abstract

Abstract: The statistical segment length of duplex DNA was determined in phage T4 ligase (poly(deoxyribonucleotide): poly(deoxyribonucleotide) ligase (AMP forming), EC 6.5.1.1) buffer (50 mm-Tris · HCl (pH 7.8), 20 mm-dithiothreitol, 10 mm-MgCl2, 1 mm-ATP) at 12 °C to be 1030(± 116) Å. This result was obtained by electron microscopic examination of the molecular distributions generated by T4 ligase-mediated joining of EcoRI-cleaved pBR322 DNA. This value of the statistical segment length was utilized in an extension of the Jacobson-Stockmayer theory on the probability of intramolecular cyclization in order to optimize DNA joining reactions that are of great utility in recombinant DNA experiments. Five cloning systems were analyzed: circular plasmid vectors that had been linearized with one or two restriction endonucleases, circular plasmids that had been tailed with deoxyhomopolymers before joining, lambda-type cloning vectors and cosmids. The results are tabulated for convenient use in molecular cloning experiments.

Url:
DOI: 10.1016/0022-2836(85)90093-2


Affiliations:


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Le document en format XML

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<term>Electron micrograph</term>
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