respiratory enzyme

enzyme /en·zyme/ (en´zīm) a protein that catalyzes chemical reactions of other substances without itself being destroyed or altered upon completion of the reactions. Enzymes are divided into six main groups: oxidoreductases, transferases, hydrolases, lyases, isomerases, and ligases. Symbol E.

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allosteric enzyme  one whose catalytic activity is altered by binding of specific ligands at sites other than the substrate binding site.

brancher enzyme , branching enzyme 1,4-α-glucan branching enzyme: an enzyme that catalyzes the creation of branch points in glycogen (in plants, amylopectin); deficiency causes glycogen storage disease type IV.

constitutive enzyme  one produced constantly, irrespective of environmental conditions or demand.

debrancher enzyme , debranching enzyme

1. amylo-1,6-glucosidase.

2. any enzyme removing branches from macromolecules, usually polysaccharides, by cleaving at branch points.

induced enzyme , inducible enzyme one whose production can be stimulated by another compound, often a substrate or a structurally related molecule.

proteolytic enzyme  peptidase.

repressible enzyme  one whose rate of production is decreased as the concentration of certain metabolites is increased.

respiratory enzyme  one that is part of an electron transport (respiratory) chain.

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respiratory enzyme

n.

An enzyme, such as oxidase, that transfers electrons from its substrate to molecular oxygen during cellular respiration.