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Log concentration–response relaxation curves to (a–c) VIP and (d) PACAP 27 in pig intravesical ureter contracted to U46619 (0.1 μM), in control conditions and in the presence of TEA (3 mM) (a), ChTX (0.1 μM) (b), NPY (0.1 μM) (c) Apa (1 μM) (d). Relaxations are expressed as a percentage of the U46619-induced contraction. The results represent means and vertical lines s.e.m. of 6–7 preparations.
