Current clamp recording from dispersed mesenteric artery EC sheets. Panel A, original trace showing reproducible and reversible hyperpolarization to 5 μM 9-phenanthrol, reduced in the presence of 1 μM TRAM-34. Panel B, box and whisker plot of paired data summarizing hyperpolarization to 5 μM 9-phenanthrol and reduced hyperpolarization (right panel) in the presence of 1 μM TRAM-34 (n = 4 EC sheets). Panel C, summary of the hyperpolarization to superfusate containing NMDG (n = 11 EC sheets). *, P < 0.05 vs. RMP; #, P < 0.05 vs. Control 9-PA.