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Log concentration–response relaxation curves to (a, c) PACAP 38 and (b, d) VIP in pig urinary bladder neck contracted by phenylephrine (PhE, 1 μM), in control conditions and in the presence of ω-CgTX (1 μM) (a, b) or capsaicin (10 μM) (c, d). Relaxations are expressed as a percentage of the PhE-induced contraction. Results represent means and vertical lines s.e.m. of 5–7 preparations. *P<0.05 vs control value (paired t-test).
