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Ion selectivity of 2-APB-induced Orai3 current. Recordings were done in cells overexpressing wild-type STIM1 and wild-type Orai3. Corresponding time courses and I-V curves in representative cells tested for external Ca2+ change (A and B), Na+ permeability (C and D), and Cs+ permeability (E and F) after 2-APB addition. Solution exchanges are indicated.
