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. 1978 Feb;75(2):774–778. doi: 10.1073/pnas.75.2.774

Construction and characterization of an Escherichia coli plasmid bearing a functional gene G of bacteriophage phiX174.

M Z Humayun, R W Chambers
PMCID: PMC411339  PMID: 273240

Abstract

In order to study the mutagenic effects of site-specific, covalent modifications of biologically active DNA, we need host cells that are permissive for any type of mutation that might be produced in vivo from the modified DNA. Specifically, we require a general, in vivo complementation system for the bacteriophage phiX174 gene G, an essential gene that we have chosen for our initial studies of chemical mutagenesis. Toward this end, we have constructed a plasmid (pphiXG) that carries a functional copy of phiX174 gene G. Three different bacterial strains that are nonpermissive for am9, a gene G amber mutant, have been transformed with pphiXG. The transformants are now permissive for this gene G mutant, but not for the gene A or E mutants that have been tested. This paper describes the construction and the biochemical characterization of this plasmid, pphiXG, and describes some of the biological properties exhibited by the pphiXG-bearing strains.

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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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