Description_x000D_ Application_x000D_ L-α-Phosphatidylcholine is suitable for use:_x000D_ • as a component of human erythroid massive amplification culture (HEMAdef) medium for clinical expansion of human erythroblasts_x000D_ • in the chloride efflux assay to examine the chloride permeability of lipid vesicles conferred by soluble CLIC1_x000D_ • in an assay to measure solubilized wax synthase activity_x000D_ • as a component of buffer A used for the resuspension of the cholate-solubilized catalytic unit of adenylate cyclase_x000D_ • as a cryoprotectant for freezing ruminant sperm_x000D_ • as a substrate for the estimation of phospholipase activity_x000D_ • to make liposomes to assess their efficiency of recruitment of ARF (ADP ribosylation factor) and AP-1 (adaptor protein)_x000D_ • in the preparation of the isolated catalytic unit of soluble adenylate cyclase_x000D_ Packaging_x000D_ 1 kg in poly bottle_x000D_ 25, 100, 500 g in poly bottle_x000D_ Biochem/physiol Actions_x000D_ Phosphatidylcholine is the major membrane phospholipid in eukaryotic cells, forming the structural component of these membranes. It also serves as a reservoir for several lipid messengers and a source for several bioactive lipids such as, lysophosphatidylcholine, phosphatidic acid, diacylglycerol, lysophosphatidylcholine, platelet activating factor, and arachidonic acid._x000D_ A major structural phospholipid in brain, comprising approx. 15% of total lipid; primarily localized to gray matter._x000D_ Preparation Note_x000D_ Purified from P 5638