Model fitness status showed that DCA measurements were not supported by model B, in which the source of DCA formation was TCA only. (A) Model A for TCE → DCA, (B) Model B for TCA → DCA, (C) Model C for TCE+TCA → DCA, and (D) Model D for TCE → DCA (two-compartment). Filled circle, symbol and error bars represent mean of three replicates (animals) and standard deviation of each TCE metabolite at a given time point.