Glycerophospholipid biosynthesis is the enzymatic formation of membrane lipids containing a glycerol backbone, hydrophobic chains, and a phosphate-associated polar region. Phosphatidic acid is a central intermediate connecting synthetic reactions with regulation of phospholipid production [1]. Branches involving diacylglycerol and activated head-group donors generate several major phospholipid classes, while additional reactions form or exchange particular polar groups. The CDP-choline pathway is linked to phospholipid transfer and the maintenance of Golgi membrane composition [2][3]. Another branch activates phosphatidic acid with CTP to form CDP-diacylglycerol. The integral membrane enzyme catalyzing this step binds the water-soluble nucleotide from the cytoplasm and the lipid substrate from the membrane. Subsequent transfer reactions connect this activated lipid intermediate to formation of specific glycerophospholipid head groups [4].