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Concentration-response curves for the contractile effects induced by α,β-methyleneadenosine 5′-triphosphate lithium salt (α,β-MeATP), P2X receptor agonist in the control or after N-(2-chloroethyl)5,8,11,14-eicosaetraenamide (ACEA; 10 µmol·L−1). All values are means ± standard error of the mean (n = 4) and are reported as a percentage of the maximal effect. *P < 0.05 compared with control value.
