%0 Journal Article
%A Koenig, B. W.
%A Gawrisch, K.
%T Specific volumes of unsaturated phosphatidylcholines in the liquid crystalline lamellar phase
%J Biochimica et biophysica acta / Biomembranes
%V 1715
%@ 0005-2736
%C Amsterdam
%I Elsevier
%M PreJuSER-49118
%P 65 - 70
%D 2005
%Z Record converted from VDB: 12.11.2012
%X 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.
%K Chemistry, Physical
%K Fatty Acids, Unsaturated: chemistry
%K Membrane Lipids: chemistry
%K Phosphatidylcholines: chemistry
%K Physicochemical Phenomena
%K Temperature
%K Fatty Acids, Unsaturated (NLM Chemicals)
%K Membrane Lipids (NLM Chemicals)
%K Phosphatidylcholines (NLM Chemicals)
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:16109383
%U <Go to ISI:>//WOS:000231586100008
%R 10.1016/j.bbamem.2005.07.006
%U https://juser.fz-juelich.de/record/49118