Fig. (1) FitR repressed fit expression, measured by lacZ reporter assays. Strains carrying pMP-fitA (A) or pMP-fitB (B) were grown in LB. When bacterial growth reached an A600 of 0.5-1.0, cells were harvested and β-galactosidase activities were measured as described (13). Y axis represents LacZ level, indicated in Miller Units. Star (* ) represents statistically significant (p < 0.05).