CYP1A1 and pulmonary arterial hypertension: Systematic analysis of the effects of Cyp1 deletions (Cyp1b1-/-, Cyp1a1-/-, and both; DKO) and diverse AhR activations (TCDD vs. PAH, 6–24 h) established the overlapping effects of Cyp1b1 deficiency and AhR activation on genes in these assemblies (Figure 1B and Figure 2A).