Microbial Growth on Dichlorobiphenyls Chlorinated on Both Rings as a Sole Carbon and Energy Source

Transformation of 2,2′-CB by strain SK-4 (A), 2,4′-CB by strain SK-4 (B), and 2,4′-CB by strain SK-3 (C) with accompanying data for cell growth, chloride release, and production of CBAs. CB concentrations are shown for bottles containing a cell inoculum (■) and control bottles lacking cells (□). CBA concentrations (⧫) represent 2-CBA in panel A and 4-CBA in panel B. Cell growth is illustrated for bottles containing CB (●) and for controls (○) containing the HMN carrier but lacking CB. Chloride = ▴. All data represent the mean of two replicate bottles, and error bars represent 1 standard deviation. Lack of error bars for analytical data indicates that the error bars were smaller than the symbol. Error bars for cell counts were eliminated to improve clarity. The typical standard deviations observed for cell counts were within 20 to 40% of the mean values shown.