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Effects of the α2-adrenoceptor antagonist, idazoxan (1 μM), on NA induced oxidation currents. (a–c) NA-induced oxidation current evoked by ten stimuli at 0.5 (a), 1 (b) and 10 Hz (c) before (upper traces) and 20 min following addition of idazoxan (lower traces). The scale bars in (a) also apply in (b) and (c). (d) Graph showing the effect of idazoxan on the amplitude of oxidation currents evoked during trains of ten stimuli at 1 Hz (n=6) *P<0.05, **P<0.01.
