is conjugate acid of is protonated form of quaternary ammonium ion phosphatidylcholine(1+) CHEBI:14802 Lecithol CHEBI:36705 Phospholutein 3-sn-Phosphatidylcholine phosphatidylcholines Choline phosphatide PC CHEBI:49183 Phosphatidyl-N-trimethylethanolamine chebi_ontology 1,2-Diacyl-sn-glycero-3-phosphocholine A glycerophosphocholine compound having <em>O</em>-acyl substituents at both the 1- and 2-positions of the glycerol. It is a major constituent of cell membranes. Lecithin phosphatidylcholine