repressor

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Related to Lac repressor: Lac operator

re·pres·sor

 (rĭ-prĕs′ər)
n.
1. also re·press·er One that represses.
2. Genetics A protein that binds to an operator, blocking transcription of an operon and the enzymes for which the operon codes.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

repressor

(rɪˈprɛsə)
n
(Genetics) biochem a protein synthesized under the control of a repressor gene, which has the capacity to bind to the operator gene and thereby shut off the expression of the structural genes of an operon
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

re•pres•sor

(rɪˈprɛs ər)

n.
a protein that binds DNA at an operator site and thereby prevents transcription of one or more adjacent genes.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.repressor - an agent that represses
agent - an active and efficient cause; capable of producing a certain effect; "their research uncovered new disease agents"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Mathematical analysis of the kinetics of the lac repressor operator interaction in the E.
The best examples of the effects of allosteric effectors on TF function are allolactose on the lac repressor interaction with DNA and steroids on nuclear factors.
Expression of the recombinant proteins was induced by IPTG which bind to the lac repressor protein, inactivating it leading to transcription of sequences downstream of the promoter.