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. 1982 Apr;150(1):76–88. doi: 10.1128/jb.150.1.76-88.1982

Analysis of the promoter-distal region of the tra operon of the F sex factor of Escherichia coli K-12 encoded by EcoRI restriction fragments f17, f19, and f2.

P A Manning, B Kusecek, G Morelli, C Fisseau, M Achtman
PMCID: PMC220084  PMID: 6277873

Abstract

The promoter-distal region of the tra operon of the F sex factor Escherichia coli K-12 was analyzed, using the chimeric plasmid pRS31, which contains the F EcoRI restriction fragments f17, f19, and f2 cloned into the EcoRI site of pSC101. A series of deletion plasmids of pRS31, extending increasing distances from a site in f17 through f19 and ending in f2, were isolated. These plasmids were examined by heteroduplex analysis with the parent DNA, and a restriction map of this region of DNA was constructed. A series of Tn5 insertion derivatives of pRS31 were also isolated and mapped, using both heteroduplex analysis and restriction mapping. Both the insertion and deletion mutants were tested in minicells for the synthesis of radioactively labeled proteins. This allowed the identification of the individual gene products and mapping of the genes. The result is a saturated physical map of this region of DNA from fragment f17 through to the IS3 insertion sequence near the promoter-distal end of f2.

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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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