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. 1984 Sep;159(3):940-5.
doi: 10.1128/jb.159.3.940-945.1984.

Dual system for potassium transport in Saccharomyces cerevisiae

A Rodríguez-Navarro, J Ramos

Dual system for potassium transport in Saccharomyces cerevisiae

A Rodríguez-Navarro et al. J Bacteriol. 1984 Sep.

Abstract

In a newly formulated growth medium lacking Na+ and NH4+, Saccharomyces cerevisiae grew maximally at 5 microM K+. Cells grown under these conditions transported K+ with an apparent Km of 24 microM, whereas cells grown in customary high-K+ medium had a significantly higher Km (2 mM K+). The two types of transport also differed in carbonyl cyanide-m-chlorophenyl hydrazone sensitivity, response to ATP depletion, and temperature dependence. The results can be accounted for either by two transport systems or by one system operating in two different ways.

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