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arXiv 1001.4908cond-mat.stat-mechnlin.AOnlin.PSphysics.bio-phq-bio.CB
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自催化反应的空间模型

A spatial model of autocatalytic reactions

Pietro de Anna, Francesca Di Patti, Duccio Fanelli, Alan J. McKane, Thierry Dauxois

摘要:

生物细胞的所有表面结构和复杂的内部剥离基本上是囊泡-膜组成的脂质双层形成封闭的囊。囊泡被认为是原始原始细胞的相关模型,它们可以为生物反应发生提供理想的环境。在本文中,我们研究了一组自催化反应的随机动力学,在一个空间有界的域,以模仿一个原始的细胞。自催化反应的组分的离散性引起大的持续振荡,即使组分的数量相当大。这些振荡是时空性质的,不像以前的研究中发现的,其中只包括时间振荡。我们推测,这些振荡可能有一个播种膜不稳定性,导致囊泡分裂的作用。通过这种方式,在简单的原始细胞中,原始细胞的生长和成分(原始遗传物质)的繁殖速度之间可以实现同步。

英文摘要:

Biological cells with all of their surface structure and complex interior stripped away are essentially vesicles - membranes composed of lipid bilayers which form closed sacs. Vesicles are thought to be relevant as models of primitive protocells, and they could have provided the ideal environment for pre-biotic reactions to occur. In this paper, we investigate the stochastic dynamics of a set of autocatalytic reactions, within a spatially bounded domain, so as to mimic a primordial cell. The discreteness of the constituents of the autocatalytic reactions gives rise to large sustained oscillations, even when the number of constituents is quite large. These oscillations are spatio-temporal in nature, unlike those found in previous studies, which consisted only of temporal oscillations. We speculate that these oscillations may have a role in seeding membrane instabilities which lead to vesicle division. In this way synchronization could be achieved between protocell growth and the reproduction rate of the constituents (the protogenetic material) in simple protocells.

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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