Fig. 2.

Metabolism of benzene at low benzene concentrations. (A) Initial and final (29 days of incubation) concentrations of benzene, Fe(II), and ¹⁴CO₂ in benzene-Fe(III) oxide cultures amended with [¹⁴C]benzene. (B) Conversion of [¹⁴C]benzene to ¹⁴CO₂ in cultures with a relatively low concentration of benzene (200 μM) and a high electron acceptor concentration [56 mM Fe(III) citrate] to promote maximum benzene utilization. The data points represent the means and standard deviations from three replicate cultures.