| 释义 |
derepression
de·re·press D0150200 (dē′rĭ-prĕs′)tr.v. de·re·pressed, de·re·press·ing, de·re·press·es To induce the operation of (a gene) by deactivating the repressor.
de′re·pres′sion (-prĕsh′ən) n.derepression (ˌdiːrɪˈprɛsən) nthe act of derepressing a geneTranslationsderepression
derepression[dē·ri′presh·ən] (microbiology) Transfer of microbial cells from an enzyme-repressing medium to a nonrepressing medium. (cell and molecular biology) Increased production of a gene product due to interference with the action of a repressor on the operator portion of the operon. derepression
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.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). |