Figure 2

Substrate and products masses evolutions during the wild type and the mutants fermentations. Mass of glucose (black square), ethanol (black triangle), biomass (black circle) and glycerol (white diamond). Period 1 corresponds to the "growth/production phase" and period 2 to the "production phase". Thick arrows indicate the time points when glucose feeding was carried out in order to adjust glucose concentration in the fermenter up to 100 g L^-1, thin arrows correspond to glucose feeding up to a concentration of 50 g L^-1.