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. 1984 Aug;159(2):472–481. doi: 10.1128/jb.159.2.472-481.1984

Characterization of IS46, an insertion sequence found on two IncN plasmids.

A M Brown, G M Coupland, N S Willetts
PMCID: PMC215669  PMID: 6086571

Abstract

The IncN plasmids R46 and N3 each contain two copies of an insertion sequence which we denote IS46. This insertion sequence has single PstI and SalI restriction sites and is 0.81 kilobases long. All four copies of IS46 were capable of forming cointegrates, although the DNA between the insertion sequences, which in each case carries a tetracycline resistance gene, was not transposable in the form of a compound transposon. IS46-mediated cointegrates resolved in Rec+ but not in RecA- cells. Recombination between two copies of IS46, causing an inversion, accounts for the existence of two distinct forms of R46. IS46-mediated deletions were probably responsible for the formation of the plasmid pKM101 from R46. IS46 was not homologous to IS1 but did show homology with IS15.

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Selected References

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