Phosphatidylcholine

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Phosphatidylcholines are a class of phospholipids that incorporate choline as a headgroup. They are a major component of biological membranes and can be isolated from either egg yolk (in Greek lekithos - ¿¿¿¿¿¿¿) or soy beans from which they are mechanically extracted or chemically extracted using hexane. Phosphatidylcholine (sometimes abbreviated as PC) is more common on the exoplasmic or outer leaflet of a cell membrane. Phosphatidylcholines are such a major component of lecithin, that, in some contexts, the terms are sometimes used as synonyms.