from The Century Dictionary.
- noun A substance from which an enzym may be formed by internal change. Also
from the GNU version of the Collaborative International Dictionary of English.
- noun (Physiol. Chem.) A mother substance, or antecedent, of an enzyme or chemical ferment; -- applied to such substances as, not being themselves actual ferments, may by internal changes give rise to a ferment.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun biochemistry A
proenzyme, or enzyme precursor, which requires a biochemical change (i.e. hydrolysis) to become an active form of the enzyme.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun any of a group of compounds that are inactive precursors of enzymes and require some change (such as the hydrolysis of a fragment that masks an active enzyme) to become active
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