regarding the intracellular messengers , the research is currently focused on the inositol phosphate system and especially on inositol-1,4,5 trisphosphate ( ip3 ) , which derives from the hydrolysis of a cellular membrane phosphoinositide : one of the most important function of ip3 is the release of intracellular calcium from the endoplasmic reticulum .
C0021554
inositol phosphate
C0021549
ip3