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arXiv 0912.2089q-bio.MNq-bio.QM
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双稳态生物系统的布尔模型

Boolean Models of Bistable Biological Systems

Franziska Hinkelmann, Reinhard Laubenbacher

摘要:

本文给出了用布尔网络模型逼近由常时滞微分方程组给出的某些类型的动力系统的算法。通常布尔模型比复杂的微分方程模型更容易理解。这项工作的动机来自数学系统生物学。虽然布尔机制不提供关于精确浓度率或时间尺度的信息,但它们通常足以捕获稳态和其他关键动态。由于其直观的性质,这些模型对生命科学的研究人员非常有吸引力。本文主要研究由时滞方程描述的具有双稳定性的动力系统。它表明,如果一个特定的主题,包括一个反馈回路存在于系统的布线图,布尔模型捕捉到的分子开关的双稳态。该方法应用于来自生物学的两个实例,lac操纵子和噬菌体λ裂解/溶原性开关。

英文摘要:

This paper presents an algorithm for approximating certain types of dynamical systems given by a system of ordinary delay differential equations by a Boolean network model. Often Boolean models are much simpler to understand than complex differential equations models. The motivation for this work comes from mathematical systems biology. While Boolean mechanisms do not provide information about exact concentration rates or time scales, they are often sufficient to capture steady states and other key dynamics. Due to their intuitive nature, such models are very appealing to researchers in the life sciences. This paper is focused on dynamical systems that exhibit bistability and are desc ribedby delay equations. It is shown that if a certain motif including a feedback loop is present in the wiring diagram of the system, the Boolean model captures the bistability of molecular switches. The method is appl ied to two examples from biology, the lac operon and the phage lambda lysis/lysogeny switch.

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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