Induction experiments with S. herbicidovorans MH grown on (R)-dichlorprop (A), (S)-dichlorprop (B), 2,4-D (C), and succinate (D). Cells were washed and resuspended in 20 mM phosphate buffer, pH 6.5 (0.15 mg of protein per ml), and uptake was started by the addition of 60 μM 14C-labeled (R)-dichlorprop, (S)-dichlorprop, or 2,4-D. Values represent means of three replicates; standard deviations are indicated by the error bars.