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Metabolic control analysis
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<p>In <a href="/facts/Biochemistry/fa2pWEBp">biochemistry</a>, metabolic control analysis (MCA) is a mathematical framework for describing <a href="/facts/Metabolic_pathway/8Py8HKJd">metabolic</a>, <a href="/facts/Cell_signaling/6oYAVP9I">signaling</a>, and <a href="/facts/Genetic_pathway/8e0CYrHz">genetic pathways</a>. MCA quantifies how variables, such as <a href="/facts/Flux/Aw3P5Bvb">fluxes</a> and <a href="/facts/Chemical_species/A8BxM3oW">species</a> concentrations, depend on <a href="/facts/Network_(mathematics)/kw3eIBUe">network</a> parameters. In particular, it is able to describe how network-dependent properties, called control <a href="/facts/Coefficient/5Hwq2Wuq">coefficients</a>, depend on <a href="/facts/Local_property/sdBEwIy2">local properties</a> called <a href="/facts/Elasticity_of_a_function/AU4fEx94">elasticities</a> or <a href="/facts/Elasticity_coefficient/Q1oUu9LW">elasticity coefficients</a>. </p><p>MCA was originally developed to describe the control in metabolic pathways but was subsequently extended to describe signaling and <a href="/facts/Gene_regulatory_network/8e0CYrHz">genetic networks</a>. MCA has sometimes also been referred to as <i>Metabolic Control Theory,</i> but this terminology was rather strongly opposed by <a href="/facts/Henrik_Kacser/30sBD0tL">Henrik Kacser</a>, one of the founders. </p><p>More recent work has shown that MCA can be <a href="/facts/Isomorphism/pj8KgkxU">mapped directly</a> on to classical <a href="/facts/Control_theory/aIuERpn6">control theory</a> and are as such equivalent. </p><p><a href="/facts/Biochemical_systems_theory/h1VDvFrm">Biochemical systems theory</a> (BST) is a similar <a href="/facts/Formalism_(mathematics)/g0690AVL">formalism</a>, though with rather different objectives. Both are evolutions of an earlier theoretical analysis by Joseph Higgins. </p><p><a href="/facts/Chemical_reaction_network_theory/KjqVNks2">Chemical reaction network theory</a> is another theoretical framework that has overlap with both MCA and BST but is considerably more mathematically formal in its approach. Its emphasis is primarily on dynamic stability criteria and related theorems associated with <a href="/facts/Law_of_mass_action/kw0j6Re9">mass-action</a> networks. In more recent years the field has also developed a sensitivity analysis which is similar if not identical to MCA and BST. </p>