FIG. 5.

Growth on biphenyl of the disruption mutants of bphT1 and bphT2. (A) The bphT1 mutant, TDR1; the bphT2 mutant, TDR2; and the bphT1/T2 double mutant, TDR12, were grown in W minimal medium containing biphenyl (1.54 g/liter). (B) TDR12 harboring pKPA1TKE containing bphT1 or pKPA1T2KE containing bphT2 was grown in W minimal medium containing biphenyl (1.54 g/liter). pKPA1 was used as a vector control. Growth was monitored by measuring the OD₆₀₀. Data are means ± standard deviations from at least three independent experiments.