1-Palmitoyl-2-oleoyl-sn-glycero-3-PC-d31 is deuterium labeled 1-Palmitoyl-2-oleoyl-sn-glycero-3-PC. 1-Palmitoyl-2-oleoyl-sn-glycero-3-PC (POPC), a phospholipid, is a major component of biological membranes. 1-Palmitoyl-2-oleoyl-sn-glycero-3-PC is used for