Figure 5

JEN 1 effect decreases for high lactate productions. Different yeast strains (see also Table 2) transformed with the L. casei or L. plantarum LDH genes (i.e., controls) or co-transformed with the same LDH and the S. cerevisiae JEN 1 genes (see also Table 1) were shake-flask grown in glucose 2% or 5% wv^-1 minimal selective medium till stationary phase. In abscissa are reported the highest lactate production determined, while in the ordinate are reported the improvements observed. The improvement value represents the ratio between the highest lactate production observed in the strain co-expressing the LDH gene and the Jen1 permease and the same strain expressing only the LDH gene.