Dictionary.com

repressor

[ ri-pres-er ]
/ rɪˈprɛs ər /
Save This Word!

noun
Genetics. a protein that binds DNA at an operator site and thereby prevents transcription of one or more adjacent genes.
QUIZ
QUIZ YOURSELF ON AFFECT VS. EFFECT!
In effect, this quiz will prove whether or not you have the skills to know the difference between “affect” and “effect.”
Question 1 of 7
The rainy weather could not ________ my elated spirits on my graduation day.
Meet Grammar CoachWrite or paste your essay, email, or story into Grammar Coach and get grammar helpImprove Your Writing
Meet Grammar CoachImprove Your Writing
Write or paste your essay, email, or story into Grammar Coach and get grammar help

Origin of repressor

From Latin, dating back to 1955–60; see origin at repress, -tor
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use repressor in a sentence

British Dictionary definitions for repressor

repressor
/ (rɪˈprɛsə) /

noun
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 & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for repressor

repressor
[ rĭ-prĕsər ]

n.
One that represses.
A protein, especially either of two proteins produced by regulatory genes, that blocks transcription of an operon.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for repressor

repressor
[ rĭ-prĕsər ]

A protein that binds to an operator, blocking transcription of an operon and the enzymes for which the operon codes.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
FEEDBACK