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. 2015 Sep 4;309(9):L970–L982. doi: 10.1152/ajplung.00041.2015

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Fig. 9. — A: representative tension tracing in guinea pig tracheal rings after an acetylcholine (EC₅₀) contraction followed by increasing concentrations of the β-adrenoceptor agonist isoproterenol in the presence of oleic acid (20 μM), linoleic acid (20 μM), GW9508 (20 μM), or their vehicle (0.1% DMSO). B: isoproterenol concentration-response relaxation curves in the presence of vehicle (0.1% DMSO) or oleic acid (20 μM; n = 8), linoleic acid (20 μM; n = 7), or GW9508 (20 μM; n = 6). C: EC₅₀ value of isoproterenol-induced relaxation of an acetylcholine (EC₅₀) contraction in the presence of oleic acid (20 μM; n = 8), linoleic acid (20 μM; n = 7), or GW9508 (20 μM; n = 6) compared with vehicle (0.1% DMSO). D: muscle force remaining after isoproterenol (10^−8.5 M)-induced relaxation of acetylcholine (EC₅₀) contraction in the presence of oleic acid (20 μM; n = 8), linoleic acid (20 μM; n = 7), or GW9508 (20 μM; n = 6) compared with vehicle control.