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J. Bacteriol., 02 1995, 981-986, Vol 177, No. 4
A Carlin, W Shi, S Dey and BP Rosen
The chromosomally encoded arsenical resistance (ars) operon subcloned into
a multicopy plasmid was found to confer a moderate level of resistance to
arsenite and antimonite in Escherichia coli. When the operon was deleted
from the chromosome, the cells exhibited hypersensitivity to arsenite,
antimonite, and arsenate. Expression of the ars genes was inducible by
arsenite. By Southern hybridization, the operon was found in all strains of
E. coli examined but not in Salmonella typhimurium, Pseudomonas aeruginosa,
or Bacillus subtilis.
Copyright © 1995, American Society for Microbiology
The ars operon of Escherichia coli confers arsenical and antimonial resistance
Department of Biochemistry, Wayne State University School of Medicine, Detroit, Michigan 48201.
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