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. 1989 Apr;171(4):2219-21.
doi: 10.1128/jb.171.4.2219-2221.1989.

Specific cesium transport via the Escherichia coli Kup (TrkD) K+ uptake system

D Bossemeyer  1 , A Schlösser, E P Bakker
Affiliations

Specific cesium transport via the Escherichia coli Kup (TrkD) K+ uptake system

D Bossemeyer et al. J Bacteriol. 1989 Apr.

Abstract

Escherichia coli cells which contain a functional Kup (formerly TrkD) system took up Cs+ with a moderate rate and affinity. Kup is a separate K+ uptake system with relatively little discrimination in the transport of the cations K+, Rb+, and Cs+. Regardless of the presence or absence of Kup, K+-replete cells took up Cs+ primarily by a very low affinity mode, proportional to the ratio of the Cs+ and K+ concentrations in the medium.

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