FIG. 4.

Cometabolism of PCB congeners from Delor 103 by P. fluorescens F113L::1180 and Burkholderia sp. strain LB400. Cells were grown for 14 days at 28°C in minimal medium supplemented with 0.5 g/liter biphenyl and 50 mg/liter Delor 103. After incubation, hexane extracts were analyzed using gas chromatography. The bars indicate the percentages of PCB congeners remaining after incubation, normalized by comparison to abiotic controls. Arithmetic means for three independent experiments analyzed in duplicate and standard errors are shown. The peak numbers refer to congeners, as shown in Table 2.