Fig. 4.
Effects of the absence and presence of scavenging extracellular peroxide with catalase on contractile responses of pulmonary arteries isolated from mice exposed to 21 days of normoxia or hypoxia in the absence and presence of 21-day treatment with ALA (50 mg·kg−1·day−1) to 10 nM phenylephrine (A) and the contractile response (B) elicited by a subsequent exposure to 20 min of acute hypoxia. *P < 0.05 vs. control; #P < 0.05 vs. 21-day hypoxia; n = 8–10. @P < 0.05 for significant effects of catalase for respective PE/acute hypoxia groups.