Metabolic map on the synthesis of cardiolipin and phosphatidylinositol (glycerophospholipids)

Metabolic map on the synthesis of phospholipids in E. coli

Metabolic map on the synthesis of glycerophospholipids (phosphatidylcholine)

The phosphatidylcholine can be synthesized in various forms in our body. Here are two metabolic maps that illustrate these possibilities ...

One option involves the addition of the polar group (phosphate + choline) to a molecule of diacylglycerol.

Alternatively, it can be synthesized through a triple methylation of the polar head of a phosphatidylethanolamine molecule.

http://www.biocarta.com/genes/Metabolism.asp