Fig. 3

Fermentation product profiles in anaerobic bioreactor batch cultures of S. cerevisiae strains IMX585 (a GND1 GND2), IMX705 (b gnd2Δ gnd1::gndA), IMX899 (c GND1 GND2 ald6Δ) and IMX756 (d gnd2Δ gnd1::gndA ald6Δ). Glucose = filled circles; Biomass = filled squares; Glycerol = open squares; Ethanol = open circles; Acetate = open triangles. All cultures were grown on synthetic medium containing 20 g L⁻¹ glucose (pH 5); e glycerol yields on glucose of the above cultures; f ethanol yields on glucose of the above cultures, corrected for ethanol evaporation. a – d display single representative cultures from a set of two independent duplicate cultures for each strain. Data on yields represent the average and mean deviation of independent duplicate cultures