Gentisate and protocatechuate dioxygenase activities of <i>B. xenovorans</i> LB400.

<p>Cells were grown on 3-HBA (black square), 4-HBA (empty square) and glucose (empty circles) as sole carbon source. (A) Gentisate 1,2-dioxygenase activity measured by maleylpyruvate formation. (B) Protocatechuate 3,4-dioxygenase activity measured by protocatechuate disappearance. Each point is an average ± SDs of values from three independent assays.