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Verification of mRNA expression of the pregnane X receptor (PXR) and cytochrome P450 3A4 (CYP3A4) in human hepatocellular liver carcinoma (HepG2) and LS-174T cells. The relative mRNA level of PXR and CYP3A4 in HepG2 and LS-174T cells was detected by reverse transcription-quantitative polymerase chain reaction. GAPDH was used as internal control.
