Definition of Activator

1. Noun. (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.

Generic synonyms: Substance
Category relationships: Biological Science, Biology
Specialized synonyms: Activating Agent, Accelerator, Catalyst, Sensitiser, Sensitizer
Derivative terms: Activate
Antonyms: Inhibitor

Definition of Activator

1. Noun. (biology) Any chemical or agent which regulates one or more genes by increasing the rate of transcription. ¹

2. Noun. One who, or that which, activates. ¹

¹ Source:

Definition of Activator

1. [n -S]

Medical Definition of Activator

1. A DNA-binding transcription metabolite that positively modulates an allosteric enzyme or regulates one or more genes by increasing the rate of transcription. (12 Mar 1998)

Activator Pictures

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Lexicographical Neighbors of Activator

activating agent
activation analyses
activation analysis
activation energy
activation product
activation record
activator (current term)
activator appliances
active acetate
active agent
active air defense
active aldehyde
active anaphylaxis
active application
active birth
active carbon dioxide
active caries
active centre

Literary usage of Activator

Below you will find example usage of this term as found in modern and/or classical literature:

1. Clinical treatises on the pathology and therapy of disorders of metabolism by Karl Harko von Noorden (1905)
"Cohnheim gave the name of " activator of the pancreas " to this substance, and ascribed to it the property of being heat-resisting. ..."

2. The Journal of Experimental Medicine by Rockefeller University, Rockefeller Institute, Rockefeller Institute for Medical Research (1906)
"Series A. Venom Uniform, activator Variable.—Each tube cot- tained 8 cubic centimeters of i per cent, horse's washed corpuscles in og per cent. NaCl. ..."

3. Collected Studies on Immunity by Paul Ehrlich (1906)
"The alcohol precipitate must therefore have contained a substance which inhibits the action of the activator, and we were actually able to demonstrate the ..."

4. International Medical and Surgical Surveyby American Institute of Medicine by American Institute of Medicine (1922)
"As an activator is required for the tyrosinase, it is possible that it is required in the ... An activator is known to be necessary for normal pigmentation, ..."

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