repressor

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Related to Lac repressor: Lac operator

repressor

 [re-pres´or]
that which restrains or inhibits; a specific protein molecule coded for by a regulatory gene, which acts through the cytoplasm to repress the synthesis of a specific protein.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

re·pres·sor

(rē-pres'ŏr),
The product of a regulator or repressor gene; a molecular entity that prevents the transcription of regulator genes under control of an operator.
Farlex Partner Medical Dictionary © Farlex 2012

repressor

(rĭ-prĕs′ər)
n.
1. also represser 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.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

re·pres·sor

(rē-pres'ŏr)
The product of a regulator or repressor gene.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

repressor

a substance, often proteinaceous, that prevents the function of a gene. see OPERON MODEL.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

re·pres·sor

(rē-pres'ŏr)
The product of a regulator or repressor gene.
Medical Dictionary for the Dental Professions © Farlex 2012