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Relaxations of PCMAs, preconstricted with U46619, to SNAP in the absence (control) or presence of one or more of the following inhibitors: 10 μM ODQ, 200 μM hydroxocobalamin (HC), 100 nM charybdotoxin (char) or 100 nM apamin (apa). Data (mean±s.e.mean; n=5–14) are expressed as a percentage of the contraction induced by U46619.
