. "\"The process of introducing one or more phosphate groups into a phosphatidylinositol, any glycerophosphoinositol having one phosphatidyl group esterified to one of the hydroxy groups of inositol.\" [ISBN:0198506732]" . . "phosphatidylinositol phosphorylation" . "Reactome:REACT_6223 \"Phosphorylation of PIP2 to PIP3 by Dp110, Drosophila melanogaster\"" . . . "phosphatidylinositol phosphate biosynthetic process" . "phosphatidylinositol phosphate phosphorylation" . "phosphoinositide phosphorylation" . "PIP biosynthesis" . "PtdInsP biosynthesis" .