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. 2017 Dec 28;314(4):L670–L685. doi: 10.1152/ajplung.00283.2016

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Fig. 4. — Effects of different concentrations of sulfide on ΔΨ. A: effects of 10–1,000 μM Na₂S on ΔΨ. Depolarization and hyperpolarization of ΔΨ are indicated by up and downward displacement of the traces, respectively. B: percentage of arteries demonstrating a depolarization (depol), a hyperpolarization preceding the depolarization (1st hyperpol), a hyperpolarization following the depolarization (2nd hyperpol), or a hyperpolarization in the absence of a depolarization (monophasic hyperpol) following the application of a number of concentrations of Na₂S. Arteries demonstrated only hyperpolarization to 10 and 30 μM sulfide. At higher concentrations of Na₂S, arteries mostly demonstrated a triphasic response (see responses to 300 μM and 1 mM Na₂S in A) but in some cases one of the phases was not observed (e.g., the 1st hyperpolarization is absent in the response to 100 μM Na₂S shown in A). The number of arteries studied at each concentration ranged between 7 and 17.