A kind of phospholipid, also known as cephalin (Kepha-lin). Among the phospholipids present in the biological world, the content of Ethanol Beta Amino Phosphoric acid is second only to lecithin, and in coliforms, it accounts for about 80% of the total phospholipids. The composition of fatty acids varies from organism to organism. Microorganisms and egg yolks contain more saturated fatty acids than animal tissues.
In the biological world, there are also derivatives containing monomethylethanolamine and dimethylethanolamine. These are formed by the methylation of phosphatidylethanolamine by S-adenosylmethionine, E. P. Ke-nnedy et al. (1956, 1964) proved that in microorganisms, phosphorylethanolamine is formed by the decarboxylation of phosphorylserine.
In animals, it is produced by the reaction of CDP ethanolamine and 1,2-diglyceride. Through the action of phospholipase A, lysophosphatidylethanolamine is produced. It is said that in the liver of mice, it transfers between microsomes and mitochondria together with lecithin.