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Bending of charged flexible membranes due to the presence of macroions

机译:由于存在大分子离子,带电柔性膜弯曲

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We investigate the bending of flexible charged membranes due to the presence of rigid rodlike macroions in the framework of the Debye-Huckel approximation. When the macroions are fixed in space at some distance from the bilayer the membrane bends towards them; we calculate the exact deformation profile. On the other had a macroion which is adsorbed on the membrane causes a deflection of the bilayer. Finally, we consider swollen lamellar polyanion/charged-lipid complexes where the macroions are intercalated between charged lipid bilayers. We predict the occurrence of a double adsorption (pinching effect) of the macroion for sufficiently flexible membranes.
机译:我们研究了在Debye-Huckel近似框架中由于刚性杆状巨分子的存在而导致的柔性带电膜的弯曲。当大分子离子固定在距双层分子一定距离的空间中时,膜会向它们弯曲。我们计算出精确的变形轮廓。另一方面,大分子离子被吸附在膜上,引起双层偏转。最后,我们考虑了溶胀的层状聚阴离子/带电脂质复合物,其中大分子插在带电脂质双层之间。我们预测,对于足够柔软的膜,大分子离子将发生两次吸附(收缩效应)。

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