[A mixture of neutral lipids (70%), phosphatidylcholine (20%) and phosphatidylethanolamine (10%), AL721 removes cholesterol from outer cell membranes, increases membrane fluidity, and impairs virus attachment to cell receptors. AL721 is potentially useful (and in study) for diseases where membrane fluidity plays a role (cancers, cystic fibrosis). (NCI04) ( NCI )] (UMLS (NCI) C0051047) =Organic Chemical; Pharmacologic Substance