- Genetics. a protein that binds DNA at an operator site and thereby prevents transcription of one or more adjacent genes.
Origin of repressor
- a person or thing that represses.
Origin of represser
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for repressor
In his principal work, the "Repressor of over much blaming of the Clergy," ed.A Literary History of the English People
Jean Jules Jusserand
- 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
- 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.
- 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.