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Dx is less effective from the apical side (pooled data)
Bath Dx 20–200 μm depolarized V t (A), V b (B) and V a (C), increased R t (D), and reduced I sc (E) and R a/R b ratio (F). Luminal Dx at 20 μm is ineffective. Number of experiments (n) indicated in A is the same for B–F. Graphs show mean ± SEM. * P < 0.05, ** P < 0.01, *** P < 0.001.
