derepression

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derepression

 [de″re-presh´un]
1. elevation of the level of an enzyme above the normal, either by lowering the corepressor concentration or by a mutation that decreases the formation of aporepressor or the response to the complete repressor.
2. the inhibition of the repressor substance produced by the regulator genes with the result that the operator gene is free to initiate the process of polypeptide formation.

de·re·pres·sion

(dē'rē-presh'ŭn),
A homeostatic mechanism for regulating enzyme production in an inducible enzyme system: an inducer, usually a substrate of a specific enzyme pathway, by combining with an active repressor (produced by a regulator gene) deactivates it; the release of the previously repressed operator is followed by enzyme production.

derepression

/de·re·pres·sion/ (de″re-presh´un) removal of repression, such as of an operon so that gene transcription occurs or is enhanced, with the net result frequently being elevation of the level of a specific enzyme.

de·re·pres·sion

(dē-rĕ-presh'ŭn)
A homeostatic mechanism for regulating enzyme production in an inducible enzyme system: an inducer, usually a substrate of a specific enzyme pathway, by combining with an active repressor (produced by a regulator gene) deactivates it.

derepression

switching on expression (see GENE EXPRESSION of genes that had been repressed (see REPRESSION).

derepression

1. elevation of the level of an enzyme above the normal, either by lowering the corepressor concentration or by a mutation that decreases the formation of aporepressor or the response to the complete repressor.
2. the inhibition of the repressor substance produced by the regulator genes with the result that the operator gene is free to initiate the process of polypeptide formation.
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