3.1.3.78 additional information the enzyme affects epithelial growth factor receptor EGFR degradation upon epithelial growth factor EGF stimulation via phosphatidylinositol-5-phosphate, overview 3.1.3.78 phosphatidylinositol 3,4,5-trisphosphate + H2O - 3.1.3.78 phosphatidylinositol 4,5-bisphosphate + H2O - 3.1.3.78 phosphatidylinositol-4,5-bisphosphate + H2O -