(L-a-Phosphatidylinositol 4,5-bisphosphate)From Bovine BrainTripotassium SaltPurity: <126>98%Contains less than 1% of the 2,4,5-isomer. Reported to stimulate selective and specific mobilization of intracellular calcium. Involved in cell growth and oncogenesis.Ref.: 1. Vacca, et al., J. Am. Chem. Soc., 109: 3478, (1987). 2. Abdel-Latif, Pharmacol. Rev., 38: 227, (1986). 3. Berridge, M.J. and Irvine, R.F., Nature, 312: 315, (1984).