Regulator gene


noun, plural: regulator genes

A gene that is involved in the production of a substance that controls or regulates the expression of one or more genes, such as the gene that codes for a repressor protein that inhibits the activity of an operator gene.


For instance, a regulator gene codes for repressor protein that binds to operator gene, which consequently prevents production of a particular enzyme. When that enzyme is needed again, a specific regulatory metabolite inhibits the repressor so that the enzyme is produced.

Also called: regulator, regulatory gene.

See also: gene regulation.

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