Liver to body weight ratios (A), percent BrDU-positive hepatocyte nuclei (B), and liver expression of peroxisome proliferation marker genes Acox1 (C) and Cyp4a10 (D) were evaluated in mice treated with vehicle (white) or TCE (black; 600 mg/kg) for 5 days. Box and whiskers plots are shown (+, mean; line, median; box, inter-quartile range; whiskers, min to max). When box is shown, 4 animals per group were available. Otherwise, there were 3 animals per group. Asterisk (*) denotes a significant difference (p<0.05) compared to vehicle-treated group within same strain.