Figure 3. Suppressor mutations increase growth in purF ridA strain background.

Strains were grown at 37°C in minimal glucose medium with adenine (open symbols) or further supplemented with 0.3 mM threonine (closed symbols). Growth was monitored over time as optical density at 650 nm. Shown are strains purF ridA (DM3871), triangles; purF ridA thrA1371 (DM6309), diamonds; and purF ridA dapA356 (DM11412), circles. Error bars represent standard deviations of three biological replicates.