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. 1985 Mar;161(3):928–932. doi: 10.1128/jb.161.3.928-932.1985

recA-independent recombination between repeated IS50 elements is not caused by an IS50-encoded function.

S H Phadnis, D E Berg
PMCID: PMC214986  PMID: 2982795

Abstract

Certain pBR322-related plasmids containing direct repeats of the insertion element IS50 appear to be unstable in recA Escherichia coli because smaller recombinant derivatives accumulate rapidly in plasmid DNA populations. We show here that (i) this instability is plasmid specific, but not IS50 specific; (ii) it is due to a detrimental effect exerted by these plasmids on bacterial growth; and (iii) the growth impairment is alleviated in cells harboring the smaller recombinant plasmids. Although a recent report had concluded that accumulation of recombinants reflected an IS50-specific recombination function, when correction is made for the relative growth rates of cells containing the parental and recombinant plasmids the evidence for such a recombination function disappears.

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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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