Figure 6

Biomass yields by yeast strains. The relative biomass yields, normalized to the values obtained by the wild-type 1403-7A strain in medium containing 20 g/L glucose, were determined during growth of strain 1403-7A (black symbols) or strain LCM001 (red symbols) in synthetic yeast nitrogen medium containing 5 (triangles), 10 (squares) or 15 (inverted triangles) g/L ammonium sulfate (open symbols) or peptone (close symbols) as nitrogen source, and 20 g/L of the indicated carbon sources. Results obtained with rich YP medium (circles) in the absence (open symbols) or presence (close symbols) of antimycin A are also shown. For the wild-type 1403-7A strain the Y_x/s values varied between 0.20 ± 0.02 and 0.48 ± 0.03 g biomass (g glucose)^-1 when ammonium sulfate or peptone were used as nitrogen source, respectively, or 0.14 g biomass (g sucrose)^-1 when antimycin A was added to the medium.