Aspects of glucose uptake in Saccharomyces cerevisiae

A wild-type Saccharomyces cerevisiae strain showed simple saturation kinetics for glucose uptake, with a Km of 4 mM when cells were obtained from exponential growth on glucose, and a similar, single Km of 2 to 8 mM was found under a variety of other growth conditions. Later in growth on glucose, and during ethanol utilization, a second kinetic component was observed, which might reflect either artifacts of membrane alteration or a Km in the molar range.

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