Comparison
of the levels of (A) 5-136, (B) 4-136, and (C) 4,5-136
in tissues and excreta from female mice with defective hepatic metabolism
(KO mice) and their age-matched congenic wild type mice (WT). PCB
136 is primarily eliminated as 5-136, and to a lesser extent as (B)
4-136 and (C) 4,5-136, in the feces of KO and WT mice; however, the
time course of fecal HO-PCB metabolite and/or conjugate levels differ
significantly between KO and WT mice. Data represent the mean ±
standard deviation of the HO-PCB metabolites levels determined in
the tissues and excreta of individual, PCB l36-treated KO (n = 7) and WT mice (n = 5) and are expressed
on a logarithmic scale as percent of the total PCB 136 dose (see Table S11 for additional details). * Significantly
different from WT (t test, p <
0.05); $ different from WT (t test, 0.05
≤ p < 0.1); nd, not detected.