1-Stearoyl-2-Arachidonoyl-d11-sn-glycero-3-PC (Synonyms: 18:0/20:4-d11-PC, PC(18:0/20:4-d11), SAPC-d11, 1-Stearoyl-2-Arachidonoyl-d11-sn-glycero-3-Phosphatidylcholine, 1-Stearoyl-2-Arachidonoyl-d11-sn-glycero-3-Phosphocholine)

1-Stearoyl-2-arachidonoyl-d₁₁-sn-glycero-3-PC (SAPC-d₁₁) is intended for use as an internal standard for the quantification of 1-stearoyl-2-arachidonoyl-sn-glycero-3-PC by GC- or LC-MS. SAPC is a phospholipid containing stearic acid and arachidonic acid at the sn-1 and sn-2 positions, respectively. It is a component of LDL and has been found in human stenotic aortic valves and atherosclerotic plaques.^1,2 Levels of SAPC are increased in the subepithelial invasive region compared to the superficial region of tumor tissue samples from patients with superficial-type pharyngeal squamous cell carcinoma.³ SAPC unilamellar vesicles have been used as substrates to quantify the activity of secretory phospholipase A₂ (sPLA₂) in the presence or absence of inhibitors.⁴ SAPC has also been used in the formation of lipid bilayers to study the effects of lipid composition on bilayer phase transitions.⁵

1.Milne, G.L., Seal, J.R., Havrilla, C.M., et al.Identification and analysis of products formed from phospholipids in the free radical oxidation of human low density lipoproteinsJ. Lipid Res.46(2)307-319(2005) 2.Lehti, S., KÄkelÄ, R., HÖrkkÖ, S., et al.Modified lipoprotein-derived lipid particles accumulate in human stenotic aortic valvesPLoS One8(6)e65810(2013) 3.Ishikawa, S., Tateya, I., Hayasaka, T., et al.The distribution of phosphatidylcholine species in superficial-type pharyngeal carcinomaBiomed. Res. Int.5387913(2017) 4.Schebb, N.H., Falck, D., Faber, H., et al.Fast method for monitoring phospholipase A2 activity by liquid chromatography-electrospray ionization mass spectrometryJ. Chromatogr. A1216(27)5249-5255(2009) 5.Tada, K., Goto, M., Tamai, N., et al.Pressure effect on the bilayer phase transition of asymmetric lipids with an unsaturated acyl chainAnn. N.Y. Acad. Sci.1189(1)77-85(2010)