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  • Title: Dual system for potassium transport in Saccharomyces cerevisiae.
    Author: Rodríguez-Navarro A, Ramos J.
    Journal: J Bacteriol; 1984 Sep; 159(3):940-5. PubMed ID: 6384187.
    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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