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Multiple Functionalities of Biochemical Reaction Networks

机译:生化反应网络的多种功能

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We consider a biological cell as a highly interconnected network of chemical reactions, which is constituted of a large number of semi-autonomous functional modules. Depending on the global state of the network, the separate functional modules may display qualitatively different behavior. As an example, we study a conceptual network of phosphorylation cycles, for which the steady-state concentration of an output compound depends on the concentrations of two input enzymes. We show that the input-output relation depends on the expression of the proteins in the network. Hence changes in protein expression, due to changes in the global regulatory network of the cell, can change the functionality of the module. In this specific example, changed expression of two proteins is sufficient to switch between the functionalities of various logical gates.
机译:我们将生物细胞视为高度相互联系的化学反应网络,它由大量的半自治功能模块组成。根据网络的整体状态,单独的功能模块可能会显示出质的不同行为。例如,我们研究了一个概念化的磷酸化循环网络,其输出化合物的稳态浓度取决于两种输入酶的浓度。我们证明了输入输出关系取决于网络中蛋白质的表达。因此,由于细胞全局调节网络的变化,蛋白质表达的变化可以改变模块的功能。在这个特定的例子中,两种蛋白质表达的改变足以在各种逻辑门的功能之间切换。

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