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. 1999 Jun 1;113(6):897–907. doi: 10.1085/jgp.113.6.897

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Effect of Kvβ1.2 on the inactivation kinetics of heterologously expressed K⁺ currents. Inactivation time course of the K⁺ currents expressed in Shaker (○) or Shaker+β (•)-transfected cells (A) and in Kv4.2 (○) or Kv4.2+β (•)-transfected cells (B). The inactivation time course was best fit to a biexponential function, and the time-constants obtained (τ₁ and τ₂) are plotted as a function of the membrane potential. Each point represents the mean ± SEM of 6–15 cells. The P values obtained by (M)ANOVA were 0.02 (τ₁) and 0.054 (τ₂) in A, and 0.415 (τ₁) and 0.102 (τ₂) in B. Representative traces of 90 ms normalized currents and fits obtained at +40 mV for each group are also shown.