Figure 2. L-Lactate production by the human LDH-carrying S. cerevisiae recombinant strain with the 6 NADH-dependent ADH isozyme genes. Cells of the recombinant strains carrying empty plasmid (A) and the human-LDH-expression plasmid (B) were incubated in the jar bioreactor with a N₂ gas purge and slow agitation. Cell growth (OD₆₆₀; circles) and concentrations of glucose (squares), ethanol (diamonds) and L-lactate (triangles) are shown.