Activator and Inhibitor

Activator 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.

Inhibitor is an antonym for activator.

Inhibitor noun - A substance that retards or stops an activity.

Activator is an antonym for inhibitor.

Nearby Words: inhibit, inhibited, inhibition, inhibiting, inhibitory