FIG 4.

The disruption of gcvP, encoding a component of GCV, stimulates growth of a ridA strain inhibited by exogenous serine. Growth curves were performed in minimal glucose medium containing 5 mM serine. The data show the averages and standard deviations for three independent cultures. The relevant genotypes of wild-type (Wt; DM14828), ridA (DM14829), and ridA gcvP (DM14839) strains are indicated. Growth of the gcvP single-mutant strain (DM14838; not shown) was indistinguishable from that of the wild type.