repressor Hear it!

repressor Definition

re·pres·sor (ri pres′ər)

noun

something that represses; esp., a protein produced in a cell that prevents the synthesis of a specific enzyme

repressor Usage Examples

Preposition: of

  • gene: Annex 3 Glucose signaling The phosphoprotein Ure2p is a central repressor of genes involved in nitrogen metabolism.

Converse of object

  • meet: The met repressor as another means of sequence recognition.

Adjective modifier

  • transcriptional: Second, a transcriptional repressor of IL-2 signaling enhances the memory response ( 2 ).
  • translational: These genes include the translational repressors, pumilio, nanos and brain tumor.

Modifies a noun

  • protein: Repressor proteins bind at the promoter DNA thus preventing RNA polymerase from initiating the transcription process.
  • gene: OM1 mutants produce excess orange pigment, caused by a mutation in a repressor gene that normally keeps the pigment at low levels.
  • domain: The C-terminal SSX domain present in SYT-SSX translocation protein contributes a transcriptional repressor domain to the protein.
  • molecule: A similar treatment may be applied to the recognition sequences for other DNA binding proteins such as repressor molecules.

Noun used with modifier

  • cro: Click here for the structure of the cro repressor from phage 434.