Figure 2. CPZ increases K⁺-independent Na⁺, K⁺-ATPase activity.

A. Raw trace of the effects of treatment with 30 µM of CPZ on K⁺-independent I_p followed by the addition of 10 mM ouabain. B. Changes in steady state K⁺-independent I_p as a result of CPZ and CPZ plus ouabain, normalized to the K⁺-free control I_p. The data represent cells isolated from 6 individual animals [number of cells are shown inside bars] and are expressed as mean ±SEM (*significantly difference from control, P<0.05). Differences between experimental groups were tested by one-way ANOVA followed by a Bonferroni post-hoc test.