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arXiv 0706.0683q-bio.SC
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离子通过细胞膜通道的转运

Ion transport through cell membrane channels

Jan Gomulkiewicz, Jacek Miekisz, Stanislaw Miekisz

摘要:

我们讨论了离子通过细胞膜通道运输的各种模型。最近的实验数据表明,离子通道的大小与离子的大小相比较,并且只有少数离子可以同时在任何单个通道中。因此,在这样的通道中的离子转运的理论描述应该考虑离子之间和离子与通道蛋白之间的相互作用。基于泊松-能斯特-普朗克方程的宏观连续模型不能满足这一点。微观布朗动力学和分子动力学提供了更真实的离子输运描述。人们还应该考虑到通道结构的动态特性。文献中尚未解决这一问题

英文摘要:

We discuss various models of ion transport through cell membrane channels. Recent experimental data shows that sizes of ion channels are compared to those of ions and that only few ions may be simultaneously in any single channel. Theoretical description of ion transport in such channels should therefore take into account interactions between ions and between ions and channel proteins. This is not satisfied by macroscopic continuum models based on Poisson-Nernst-Planck equations. More realistic descriptions of ion transport are offered by microscopic Brownian and molecular dynamics. One should also take into account a dynamical character of the channel structure. This is not yet addressed in the literature

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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