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J Bacteriol. 1981 August; 147(2): 401-409

Physical map of the Salmonella typhimurium histidine transport operon: correlation with the genetic map.

F Ardeshir, C F Higgins and G F Ames

ABSTRACT

A detailed restriction map of a 12.4-kilobase EcoRI fragment of Salmonella typhimurium deoxyribonucleic acid (DNA) containing the entire histidine transport operon and the argT gene is presented. Subclones of specific regions of the transport operon of S. typhimurium were constructed in plasmid vectors. An accurate correlation between the restriction map and the location of genetically defined deletions was obtained by hybridizing restriction digests of chromosomal DNA from strains carrying each deletion with cloned transport operon DNA as a probe. These data were used to position the histidine transport genes on the cloned 12.4-kilobase fragment of DNA.

J Bacteriol. 1981 August; 147(2): 401-409






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