Galle J, Volke F
Department of Physics, University of Leipzig, Germany.
Biophys Chem. 1995 Apr;54(2):109-17. doi: 10.1016/0301-4622(94)00123-2.
A lattice model of a lipid bilayer near the so-called main phase transition between the liquid crystalline (L alpha) and the gel (L beta) phase is presented. It is based on a two-state model. Jump dynamics are defined for the lattice molecules to simulate lateral diffusion. The temperature and hydration dependence of the lateral diffusion coefficients of the model are calculated for the L alpha phase using Monte Carlo simulation techniques. The results obtained allow the estimation of the hydration dependent part of the lateral diffusion activation energy by thermodynamical quantities. We compare these results with measured activation energies of dipalmitoylphosphatidylcholine (DPPC) and propose a model to describe the total lateral diffusion activation energy of such systems.
本文提出了一种脂质双层在所谓液晶（Lα）相和凝胶（Lβ）相之间的主要相变附近的晶格模型。它基于双态模型。为晶格分子定义了跳跃动力学以模拟横向扩散。使用蒙特卡罗模拟技术计算了该模型在Lα相时横向扩散系数的温度和水合依赖性。所得结果允许通过热力学量来估计横向扩散活化能的水合依赖性部分。我们将这些结果与二棕榈酰磷脂酰胆碱（DPPC）的测量活化能进行比较，并提出一个模型来描述此类系统的总横向扩散活化能。
