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. 1983 Aug;41(2):488–493. doi: 10.1128/iai.41.2.488-493.1983

Isolation and characterization of a plasmid from phase I Coxiella burnetii.

J E Samuel, M E Frazier, M L Kahn, L S Thomashow, L P Mallavia
PMCID: PMC264667  PMID: 6307871

Abstract

The DNA from the Nine Mile phase I strain of Coxiella burnetti, the etiological agent of Q fever, has been isolated and purified by cesium chloride-ethidium bromide density gradient centrifugation. A fraction of this DNA has a density characteristic of plasmid DNA. The plasmid DNA was cut with 20 different restriction endonucleases and shown to be a discrete entity. The plasmid, designated QpH1, is approximately 36 kilobases in size and has a molecular mass of 2.4 x 10(7) daltons. A partial restriction map of QpH1 has been constructed by using the restriction endonucleases SalI, KpnI, PstI, and XbaI. QpH1 DNA radioactively labeled by nick translation was used to show that sequences similar to the plasmid are also present in the phase II antigenic variant of C. burnetii.

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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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