Barotropic Phase Transitions of Asymmetric Phospholipid Bilayer Membranes: Molecular Asymmetry and Phase Stability

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  • MATSUKI Hitoshi
    Institute of Technology and Science, The University of Tokushima
  • TADA Kaori
    Institute of Technology and Science, The University of Tokushima
  • GOTO Masaki
    Institute of Technology and Science, The University of Tokushima
  • TAMAI Nobutake
    Institute of Technology and Science, The University of Tokushima

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  • 非対称リン脂質二重膜の高圧相転移：分子非対称性と相安定性
  • ヒタイショウ リン シシツ ニジュウ マク ノ コウアツ ソウ テンイ ブンシ ヒタイショウセイ ト ソウ アンテイセイ

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Abstract

  The effect of pressure on the bilayer phase transitions of two kinds of asymmetric phospholipids, phosphatidylcholines (PCs) with different saturated acyl chains in the sn-1 and sn-2 positions on the glycerol backbone and mixed-chain PCs with an unsaturated acyl chain in the sn-1 or sn-2 position, is described. The alignment of the sn-1 and sn-2 acyl chains at the therminal methyl ends and the mismatch of the effective chain length between the sn-1 and sn-2 acyl chains produce a significant influence on their bilayer properties. The correlation between molecular asymmetry of PC molecules and phase stabilities of the bilayer membranes is discussed.<br>

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