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Immunofluorescence microscopy showing intracellular localization of (A) CYP1A1, (B) CYP1A2, (C) CYP1B1, (D) CYP3A4, (E) COMT and (F) Negative Control in P-UAECs. Positive staining is green fluorescence with nuclei depicted in blue (DAPI). Pictures are representative of three experiments.