Figure 6.
IKr activation and deactivation properties in mutated and corrected LQT2-hiPSC-derived CMs and in wild-type and mutated hESC-derived CMs. (A, B) Average peak tail current normalized to the maximal current following repolarization to −40 mV in mutated (red) and corrected (black) LQT2-hiPSC-derived CMs (A) and in wild-type (black) and mutated (red) hESC-derived CMs (B). Inset: voltage protocol. (C, D) Average time constants of IKr activation (τ) in mutated (red) and corrected (black) LQT2-hiPSC-derived CMs (C) and in wild-type (black) and mutated (red) hESC-derived CMs (D). (E, F) Average slow and fast time constants of IKr deactivation (τs and τf, respectively) in mutated (red) and corrected (black) LQT2-hiPSC-derived CMs (E) and in wild-type (black) and mutated (red) hESC-derived CMs (F).