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arXiv 1108.3776cond-mat.softphysics.bio-phphysics.flu-dyn
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含固定夹杂物的膜动力学

Dynamics of membranes with immobile inclusions

Naomi Oppenheimer, Haim Diamant

摘要:

细胞膜通过固定的内含物固定在细胞骨架上。我们研究了这种锚对流体膜和包埋在其中的可动内含物(蛋白质)的面内动力学的影响,不动颗粒导致可动颗粒的扩散系数降低,抑制了颗粒对的相关扩散。由于膜流的长程、准二维性质,这些效应在不动夹杂物的面积分数较低(低于百分之一)时变得显着。

英文摘要:

Cell membranes are anchored to the cytoskeleton via immobile inclusions. We investigate the effect of such anchors on the in-plane dynamics of a fluid membrane and mobile inclusions (proteins) embedded in it. The immobile particles lead to a decreased diffusion coefficient of mobile ones and suppress the correlated diffusion of particle pairs. Due to the long-range, quasi-two-dimensional nature of membrane flows, these effects become significant at a low area fraction (below one percent) of immobile inclusions.

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