proactivator

proactivator
A substance that, when chemically split, yields a fragment (activator) capable of rendering another substance enzymatically active.

* * *

pro·ac·ti·va·tor (pro-akґtĭ-va″tər) the inactive precursor form of an activator, or a factor that requires a chemical change, usually by an enzyme, to become an activator.

Medical dictionary. 2011.

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