Figure S3.
Localization of endogenous IP3R1, STIM1 and KRAP. (A) Relative localization of STIM1 and IP3R1 detected by immunofluorescence in HeLa cells at rest. While both proteins share the same intracellular compartment, there is no overlap of the signals at the PM where the IP3R1 fluorescence reveals the “licensed” receptors. (B) Colocalization at the PM focal plane of IP3R1 and KRAP in HeLa cells at rest.

Localization of endogenous IP 3 R1, STIM1 and KRAP. (A) Relative localization of STIM1 and IP3R1 detected by immunofluorescence in HeLa cells at rest. While both proteins share the same intracellular compartment, there is no overlap of the signals at the PM where the IP3R1 fluorescence reveals the “licensed” receptors. (B) Colocalization at the PM focal plane of IP3R1 and KRAP in HeLa cells at rest.

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