The effect of aryl hydrocarbon receptor ligands on the expression of polymerase (DNA directed) kappa (Polκ), polymerase RNA II (DNA directed) polypeptide A (PolR2a), CYP1B1 and CYP1A1 genes in rat liver

► AhR up-regulates the mRNA transcription of PolR2a. ► AhR up-regulates the mRNA transcription of Polκ. ► Different time course of mRNA induction by BNF treatment of rats for CYP1A1 and CYP1B1.