title: Quantitative 31P nuclear magnetic resonance analysis of the phospholipids of erythrocyte membranes using detergent.
abstract: 31P Nuclear magnetic resonance (NMR) spectra of human erythrocyte lysates dissolved in sodium cholate were acquired. The narrow resonances of phospholipids were mostly well resolved, allowing identification and accurate quantitative analysis of phospholipid classes of the erythrocyte membranes. The ether-linked phosphatidylethanolamine components of the erythrocyte membranes were identified, based on the removal of plasmalogens by acidolysis and of diacyl phospholipid species by degradation using phospholipase A1. It was also shown that the introduction of double bonds on the acyl chains of phosphatidylcholine shifted the 31P NMR resonances to lower frequencies. Quantitative analyses of phospholipids from the spectra were based on their apparent molar concentrations. The recoveries of phospholipids from erythrocytes were significantly higher than those using conventional extraction procedures.
authors.affiliation: Department of Biochemistry, University of Sydney, N.S.W., Australia.
authors.forename: M H
authors.initials: MH
authors.lastname: Nouri-Sorkhabi
authors.forename: L C
authors.initials: LC
authors.lastname: Wright
authors.forename: D R
authors.initials: DR
authors.lastname: Sullivan
authors.forename: P W
authors.initials: PW
authors.lastname: Kuchel
mesh_terms: D002457:Cell Extracts / Q000032:analysis* / Q000737:chemistry; D019826:Cholic Acid; D002793:Cholic Acids / Q000737:chemistry*; D003902:Detergents / Q000737:chemistry*; D004910:Erythrocyte Membrane / Q000737:chemistry*; D004987:Ethers / Q000737:chemistry; D006801:Humans; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D010714:Phosphatidylethanolamines / Q000737:chemistry; D010741:Phospholipases A / Q000378:metabolism; D054466:Phospholipases A1; D010743:Phospholipids / Q000032:analysis* / Q000145:classification / Q000302:isolation & purification; D010759:Phosphorus Isotopes
chemical_list: D002457:Cell Extracts; D002793:Cholic Acids; D003902:Detergents; D004987:Ethers; D010714:Phosphatidylethanolamines; D010743:Phospholipids; D010759:Phosphorus Isotopes; D010741:Phospholipases A; D054466:Phospholipases A1; D019826:Cholic Acid