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. 1969 Nov;100(2):796–802. doi: 10.1128/jb.100.2.796-802.1969

Chromosomal Location of a Gene Involved in Potassium Ion Uptake in Escherichia coli B

Maritha Burmeister 1
PMCID: PMC250160  PMID: 16559072

Abstract

A chromosomal lesion responsible for defective potassium ion uptake in Escherichia coli B has been mapped by use of standard interrupted-mating crosses. The mutation, kac-1, is in strain RD-2, which is deficient in K+ intake, exchanges cell K+ for extracellular isotope at a reduced rate, and has an abnormality of phosphorus metabolism associated with its potassium deficiency. This report places kac-1 at about 4 min clockwise from pro, close to gal. The locus of kac-1 is distinctly different from the potassium retention mutant in strain B-207, the only other potassium accumulation mutant mapped in E. coli so far. In this study, two other potassium accumulation mutations, kac-2 and kac-3, whose particular type of accumulation defects have not yet been determined, were mapped. These mutations are in the same region of the chromosome as kac-1.

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Selected References

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