AskDefine | Define activator

Dictionary Definition

activator n : (biology) any agency bringing about activation; a molecule that increases the activity of an enzyme or a protein that increases the production of a gene product in DNA transcription [ant: inhibitor]

User Contributed Dictionary



  1. Any chemical or agent which regulates one or more genes by increasing the rate of transcription.
  2. One who, or that which, activates.

Extensive Definition

Activator may mean:
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