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12 Cards in this Set
- Front
- Back
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Activation
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Any process that starts or increases the action of an enzyme. |
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Inhibition |
Any process that slows or stops the action of an enzyme. |
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Feedback control |
Regulation of an enzyme's activity by the product of a reaction later in a pathway. |
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Allosteric control |
An interaction in which the binding of a regulator at one site on a protein affects the protein's ability to bind another molecule at a different site.
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Allosteric enzyme |
An enzyme whose activity is controlled by the binding of an activator or inhibitor at a location other than the active site. |
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Uncompetitive inhibition |
Enzyme regulation in which an inhibitor binds reversibly to the enzyme-substrate complex, blocking the binding of the second substrate to the active site.
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Competitive inhibition |
The inhibitor competes with substrate for binding to the active site. |
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Irreversible inhibition |
Enzyme deactivation in which an inhibitor forms covalent bonds to the active site, permanently blocking it. |
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Zymogen or preoenzyme |
A compound that requires a chemical reaction that splits off part of the molecule to become an active enzyme. |
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Genetic control |
Regulation of enzyme activity by control of the synthesis of enzymes; regulated by genes. |
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Antioxidant |
A substance that prevents oxidation by reacting with an oxidizing agent. |
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Free radical |
An atom or molecule with an unpaired electron; antioxidants defuse the potentially harmful action of free radicals. |
