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Aryl hydrocarbon receptor repressor (AhRR) mRNA expression in HepG2 and HeLa cells. HepG2 and HeLa cells were treated with 3 µM PCB 126 for 6 h and AhRR mRNA expression levels were determined using qRT-PCR. Analysis was performed with normalization to RPLP0. * p < 0.05 HeLa vs. HepG2; Error bars = SEM; n = 3.
