Collective dynamics in fully hydrated phospholipid bilayers studied by inelastic X-ray scattering
Collective dynamics in fully hydrated phospholipid bilayers studied by inelastic X-ray scattering
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DOI：
10.1103/physrevlett.86.740
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发表时间：
2001-01-22
影响因子：
8.6
通讯作者：
Sette, F
中科院分区：
文献类型：
--
作者：
Chen, SH;Liao, CY;Sette, F
通过非弹性 X 射线散射技术研究了接近完全水合的 DLPC（二月桂基磷脂酰胆碱）双层在低于和高于主转变温度时的短波长密度波动。基于广义三有效本征模理论的分析使我们首次构建了高频声模的色散关系。在 k = 14 nm(-1) 附近激发的 Marl;rd 软化，对应于 L-α 相中结构因子中的脂质链-链相关峰，意味着脂质链短波长平面内运动的普遍发生，这可能对小分子跨膜运输很重要。 DOI：10.1103/PhysRevLett.86.740。
The short wavelength density fluctuation of DLPC (dilaurylphosphatidylcholine) bilayers close to full hydration has been studied by the inelastic x-ray scattering technique below and above the main transition temperature. The analysis based on a generalized three effective eigenmode theory allows us to construct the dispersion relation of the high frequency sound mode for the first time. The marl;rd softening of the excitation near k = 14 nm(-1), corresponding to the lipid chain-chain correlation peak in the structure factor, in the L-alpha, phase implies prevalent occurrences of short-wavelength in-plane motions of lipid chains that might be of importance for transportation of small molecules across membranes. DOI: 10.1103/PhysRevLett.86.740.