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Maltose transporter genes were isolated from four lager yeast strains and sequenced. All four strains contain at least two different types of maltose transporter genes, MTT1 and MAL31. In addition, ‘long’ 2.7 kb, and ‘short’ 2.4 kb, versions of each type exist. The size difference is caused by the insertion of two repeats of 147 bp into the promoter regions of the long versions of the genes. As a...
Snf3 is a plasma membrane protein in Saccharomyces cerevisiae able to sense the presence of glucose. Although the Snf3 protein does not transport sugars, it shares sequence similarity with various glucose transporters from other organisms. We investigated the sugar specificity/preferences of Snf3. The ability of cells to sense sugars in vivo was monitored by following the degradation of the Mth1 protein,...
The performance of yeast is often limited by the constantly changing environmental conditions present during high-gravity fermentation. Poor yeast performance contributes to incomplete and slow utilization of the main fermentable sugars which can lead to flavour problems in beer production. The expression of the FLO and MAL genes, which are important for the performance of yeast during industrial...
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