Interactions between the transposable element IS21 on R68.45 and TN7 in Pseudomonas aeruginosa PAO.

Abstract

Tn7 transposes from the chromosome of Pseudomonas aeruginosa into the plasmid R68.45 with tandem IS21, at up to 400 times the frequency that it transposes into R68, which has only one copy of IS21. While R68::TN7 derivatives are stable, R68.45::Tn7 isolates undergo frequent deletions. Instability of R68.45 occurs whether Tn7 is inserted into the plasmid… (More)

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