A, representative contractile data showing the effect of 1–10 μm GSK 7975A on urethral contractions induced by increasing concentration of PE (0.1–30 μm). B, summary data showing the effect of 1–10 μm GSK 7975A on urethral contractions induced by increasing concentration of PE (0.1–30 μm, n = 6). *
p < 0.05, **
p < 0.01, ****
p < 0.0001.