Orai3, but not Orai1, can be activated by 50 μm
2-APB. A-C, averaged [Ca2+]i
traces (±S.E.) before and following store depletion by addition of TG
in cells transfected with GFP only (A, negative control, n =
12 cells), STIM1 + Orai1 (B, n = 13), and STIM1 + Orai3 (C,
n = 11). D-F, averaged [Ca2+]i
traces (±S.E.) without store depletion in cells transfected with GFP
only (D, n = 8 cells), Orai1 (E, n = 6), and Orai3 (F,
n = 8). Solution exchanges are indicated.