repressor

repressor definition - medical

re·pres·sor (rĭ-prĕsˈər)

noun
  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® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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