D-myo-Inositol-3,4,5-triphosphate (Ins(3,4,5)-P3) is a structural analog of Ins(1,4,5)-P3 and a member of the inositol phosphate (InsP) cell signaling family of molecules. D-myo Ins(3,4,5)-P3 is 200-fold less potent than D-myo Ins(1,4,5)-P3 at initiating Ca++ release when injected into Xenopus...