The Ano1(0)ΔEAVK splice variant has slower activation kinetics than Ano1(0) at intermediate [Ca2+]i. A: normalized Cl− current traces activated by a step pulse to +80 mV from Ano1(0) (black) or Ano1(0)ΔEAVK (gray) at 500 nM (left) or 3 µM (right) [Ca2+]i. B: time constant of activation (τACT) vs. voltage stimulus of Ano1(0) (black) or Ano1(0)ΔEAVK (gray) with 500 nM (left) or 3 µM (right) [Ca2+]i. P < 0.05, variation from EAVK. P > 0.05, variation from or interaction with voltage stimulus by a two-way ANOVA. *P < 0.05, by Bonferroni posttest. C: τACT of Ano1(0) (black) or Ano1(0)ΔEAVK (gray) vs. [Ca2+]i. P < 0.05, variation from and interaction with [Ca2+]i by a two-way ANOVA. *P < 0.05, by Bonferroni posttest; n = 5–16 cells per point.