B. Percentage FCDI (plateau/peak, mean±s.e.m.), for HEKS1/S2-/- cells transfected with STIM1+ORAI1 (O1 S1), 22 patch-clamped cells or transfected with STIM1A and ORAI1 (O1 S1A,17 cells) from three independent transfections. Data information: , *P<0.05, **P<0.01, unpaired T test with Welch's correction. For patch-clamp experiments, number in bars indicate measured cells, which were from three independent transfections. 