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Multiple Functionalities of Biochemical Reaction Networks

机译:生物化学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:我们考虑一种生物细胞作为高度互连的化学反应网络,其由大量半自动功能模块构成。根据网络的全局状态,单独的功能模块可以显示定性不同的行为。作为一个例子,我们研究了磷酸化循环的概念网络,输出化合物的稳态浓度取决于两种输入酶的浓度。我们表明输入 - 输出关系取决于网络中蛋白的表达。因此,由于细胞的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。在该具体示例中,改变了两种蛋白质的表达足以在各种逻辑栅极的功能之间切换。

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