Growth of bphGF1E1 disruption mutants on ethylbenzene. The strains RDE1, RDF1, and RDG1, which are disruption mutants of bphE1 (A), bphF1 (B), and bphG (C), respectively, and their derivatives, RDE1/pK4Etsr, RDF1/pK4Ftsr, and RDG1/pK4Gtsr, which have plasmids containing the respective intact genes, together with RHA1 were grown in W minimal medium at 30°C on ethylbenzene.