FIGURE 7.

Effect of high extracellular potassium (KPSS) on Na₂S and GYY4137 relaxation. Original traces showing contractions induced by 3 µM U46619 or 60 mM KPSS and effect of increasing concentrations of (A,B) Na₂S (1–1,000 µM) or (C,D) GYY4137 (1–1,000 µM). (E) Average Na₂S induced vascular relaxations in vessels contracted with U46619 or KPSS; (F) Average GYY4137 induced vascular relaxations in vessels contracted with U46619 or KPSS. Where no error bars are indicated, error lies within dimensions of symbol. All data are means ± SEM (n = 5–10). *p < 0.05, two-way ANOVA.