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Changes in extracellular pH upon addition of 10 mM (final concentration) fructose (F), xylitol (X), sorbose (S), mannitol (M), glucose (G), galactose (Ga) or xylose (Xse) to aqueous cell suspension of S. cerevisiae cells grown in YNB medium with 2% fructose and expressing ZrFSY1 from its own promoter. The arrows indicate the times of sugar/polyol addition. Data are representative of at least two independent experiments.
