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| Hauptseite > Publikationsdatenbank > Specific volumes of unsaturated phosphatidylcholines in the liquid crystalline lamellar phase |
| Hauptseite > Publikationsdatenbank > Specific volumes of unsaturated phosphatidylcholines in the liquid crystalline lamellar phase |
| Journal Article | PreJuSER-49118 |
;
2005
Elsevier
Amsterdam
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Please use a persistent id in citations: doi:10.1016/j.bbamem.2005.07.006
Abstract: The specific volumes of seven 1,2-diacyl-sn-glycero-3-phosphocholines with symmetric, unbranched acyl chains containing one, four, or six cis double bonds per chain, or with a saturated sn-1 chain and one, four, or six cis double bonds in the sn-2 chain were determined by the neutral buoyancy method. Experiments were conducted in the liquid crystalline lamellar phase over the temperature range from 5 to 35 degrees C. It is demonstrated that the molecular volume of phosphatidylcholines can be well approximated as the sum of a constant volume of the polar lipid head region and the temperature-dependent volumes of hydrocarbon chain CH2, CH, and terminal CH3 groups. A linear dependence of chain segment volumes on temperature was observed. A self-consistent set of partially temperature-dependent volumes is obtained that allows prediction of phosphatidylcholine molecular volumes within very tight error margins.
Keyword(s): Chemistry, Physical (MeSH) ; Fatty Acids, Unsaturated: chemistry (MeSH) ; Membrane Lipids: chemistry (MeSH) ; Phosphatidylcholines: chemistry (MeSH) ; Physicochemical Phenomena (MeSH) ; Temperature (MeSH) ; Fatty Acids, Unsaturated ; Membrane Lipids ; Phosphatidylcholines ; J ; specific volume (auto) ; lipid (auto) ; polyunsaturated fatty acid (auto) ; DHA (auto) ; neutral buoyancy method (auto)
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