Home › Phosphatidylinositol Phosphate (PIP) Phosphatidylinositol Phosphate (PIP) PI(3)P; PI(4)P; PI(5)P; PtdIns3P; PI3P; PtdIns4P; PI4P; PtdIns5P; PI5P SPN P893 PubMed 22791334 Wiki PIP Phosphatidylinositol 5-phosphate is one of the seven phosphoinositides, and is the last to have been discovered to be naturally occurring.