Phosphatidylinositol (abbreviated PtdIns, or PI) is a minor phospholipid component of mammalian cell membranes. It is however the substrate for a large number of enzymes which are involved in cell signalling.

See also

Phosphatidylinositol 3-phosphate

Phosphatidylinositol 4-phosphate

Phosphatidylinositol 5-phosphate

Phosphatidylinositol (3,4)-bisphosphate

Phosphatidylinositol (3,5)-bisphosphate

Phosphatidylinositol (4,5)-bisphosphate

Phosphatidylinositol (3,4,5)-trisphosphate

PI 3-kinase

Phospholipids

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