arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2202.10552q-bio.MNmath.DS
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混合反馈下代谢途径的定性行为

Qualitative Behavior of a Metabolic Pathway with Hybrid Feedback

Claudia Lopez-Zazueta, Vincent Fromion

摘要:

我们研究了一个模型的定性行为,以表示局部调控的代谢网络。该模型基于[A. Goelzer,F.贝卡尔布里克奇岛Martin-Verstraete等人,BMC Syst Biol 2(2008),pp. 1- 18]。在这类调节中,代谢物效应物是代谢途径的终产物。我们假设通路的输入根据代谢物效应物的浓度在零和正值之间切换。将切换系统视为一个微分包含,证明了它依赖于输入的正值收敛到全局一致渐近稳定的平衡点,到达滑动模或在滑动模附近振荡.最后,我们证明了在任何情况下,切换系统的解是具有光滑或分段线性输入的方程序列的解的极限。

英文摘要:

We study the qualitative behavior of a model to represent local regulation in a metabolic network. The model is based on the end-product control structure introduced in [A. Goelzer, F. Bekkal Brikci, I. Martin-Verstraete et al., BMC Syst Biol 2 (2008), pp. 1--18]. In this class of regulation, the metabolite effector is the end-product of a metabolic pathway. We suppose the input to the pathway to switch between zero and a positive value according to the concentration of the metabolite effector. Considering the switched system as a differential inclusion, we prove that it converges to a globally uniformly asymptotically stable equilibrium point, reaches the sliding mode or oscillates around the sliding mode depending on the positive value of the input. Finally, we show that in any case the solution of the switched system is the limit of solutions of equation sequences with smooth or piecewise linear inputs.

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