18:1 EPC (chloride), an egg phosphatidylcholine, is used for liposomes applied in drug delivery[1].
References:
[1]. J Lang, et al. Liposomes composed of partially hydrogenated egg phosphatidylcholines: fatty acid composition, thermal phase behavior and oxidative stability. Chem Phys Lipids. 1990 Mar;53(1):91-101.
















