Figure 1.

Contractile responses to noradrenaline (NA) in porcine isolated coronary arteries. Responses to noradrenaline were assessed in the absence and presence of endothelium, propranolol (1 μM) and prazosin (1 μM). Data are means±s.e.mean from four separate experiments, expressed as a percentage of the response to 60 mM KCl. ^**P<0.01 indicate significant differences from noradrenaline alone.