Genetics. a protein that binds DNA at an operator site and thereby prevents transcription of one or more adjacent genes.

1955–60; < Latin; see repress, -tor Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To repressor
World English Dictionary
repressor (rɪˈprɛsə)
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 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
American Heritage
Medical Dictionary

repressor re·pres·sor (rĭ-prěs'ər)

  1. One that represses.

  2. 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.
Cite This Source
American Heritage
Science Dictionary
repressor   (rĭ-prěs'ər)  Pronunciation Key 
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 © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Copyright © 2014, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature