Fig. 3.

The mRNA expression of more phase II enzymes in livers of male mice after treatment with corn oil (vehicle), TCDD (AhR ligand), TCPOBOP (CAR ligand), or PCN (PXR ligand) at 2, 5, 25, and 60 days of age (n = 4–6 per group). The expressions measured in triplicate are first normalized to the expression of the housekeeping gene β-actin, and then are expressed as fold changes compared with the vehicle-treated group at that particular age. Asterisks (*) represent statistical difference (P < 0.05) compared with the vehicle-treated group at the same age.