IP3R type 1 (IP3R1) and type 3 (IP3R3) were expressed in extra-embryonic tissues.
IP3R1 and IP3R3 were expressed in vascular endothelium.
IP3R1−/−IP3R3−/− mutant embryos were embryonic lethal.
Poor elongation of extra-embryonic mesoderm into the labyrinth of IP3R1−/−IP3R3−/− mutants.
The vessels in IP3R1−/−IP3R3−/− allantois and yolk sac were disorganized.