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Effect of suramin on EFS-evoked hyperpolarization in the longitudinal smooth muscle of the chicken mesenteric artery. (A) Typical recordings of EFS-evoked responses in the absence (control) or presence of suramin (500 µM) are shown. (B) Peak amplitudes of EFS-evoked hyperpolarization are summarized as means ± SEM (n= 5). *Significantly different from control values (P < 0.05). EFS, electrical field stimulation.
