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. 1983 Jun;154(3):1263-8.
doi: 10.1128/jb.154.3.1263-1268.1983.

Plasmid-controlled resistance to copper in Escherichia coli

T J Tetaz, R K Luke

Plasmid-controlled resistance to copper in Escherichia coli

T J Tetaz et al. J Bacteriol. 1983 Jun.

Abstract

The copper resistance of a strain of Escherichia coli isolated from the effluent of a piggery where pigs were fed a diet supplemented with copper sulfate was controlled by a conjugative 78-megadalton plasmid designated pRJ1004. Plasmid pRJ1004 exhibited surface exclusion and incompatibility with standard plasmids belonging to incompatibility groups I1 and K. Sensitive strains of E. coli K-12 were unable to form colonies on nutrient agar containing more than 4 mM copper, whereas transconjugants which harbored pRJ1004 were able to form colonies on medium containing up to 20 mM copper.

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