Responses to potassium channel inhibitors do not differ between CYP1A1 WT and KO mice. (A) DHA-mediated vasodilation after pre-incubation with the BK channel blocker, iberiotoxin (IBTX) in CYP1A1 WT and (B) KO mice. (C) DHA-mediated relaxation after pre-incubation with both IBTX and the voltage gated potassium channel blocker, 4-AP in CYP1A1 WT and (D) KO mice. Data represent mean ± SEM and were analyzed by two-way, repeated measures ANOVA, using post hoc Holm-Sidak comparisons; *p < 0.05, compared to wildtype (n=4–6/genotype).