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Increased protein expression of P-glycoprotein, Cyp1a1, and Cyp1b1 in isolated rat brain capillaries following 3 h of exposure to 0.5–1 nM TCDD in vitro. A) Western blots with β-actin as a loading control. B–D) Measured band intensities in membranes from 3 preparations: P-glycoprotein (B), Cyp1a1 (C), and Cyp1b1 (D). *P < 0.05, **P < 0.01 vs. control.
