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Cumulative concentration-response curves to phenylephrine or noradrenaline in thoracic aorta (a) mesenteric artery (b), first (c) or second (d) branch of the small mesenteric arteries (SMA), iliac artery (e) and tail artery (f) obtained from adult SHR or WKY rats. Data are means±s.e.mean of 5 – 6 experiments and are expressed as a percentage of the maximal contraction to the agonist. The Emax and the pEC50 values are shown in Table 2.
