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. 1980 Jan;33(1):330–339. doi: 10.1128/jvi.33.1.330-339.1980

In vitro recombination of bacteriophage T7 DNA damaged by UV radiation.

W E Masker, N B Kuemmerle
PMCID: PMC288550  PMID: 6245236

Abstract

A system capable of in vitro packaging of exogenous bacteriophage T7 DNA has been used to monitor the biological activity of DNA replicated in vitro. This system has been used to follow the effects of UV radiation on in vitro replication and recombination. During the in vitro replication process, a considerable exchange of genetic information occurs between T7 DNA molecules present in the reaction mixture. This in vitro recombination is reflected in the genotype of the T7 phage produced after in vitro encapsulation; depending on the genetic markers selected, recombinants can comprise nearly 20% of the total phage production. When UV-irradiated DNA is incubated in this system, the amount of in vitro synthesis is reduced and the total amount of viable phage produced after in vitro packaging is diminished. In vitro recombination rates are also lower when the participating DNA molecules have been exposed to UV. However, biochemical and genetic measurements confirmed that there is little or no transfer of pyrimidine dimers from irradiated DNA into undamaged molecules.

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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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