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Related to zymogen: zymogen granules
an inactive precursor that is converted into an active enzyme by action of an acid or another enzyme or by other means; a proenzyme. adj., adj zymogen´ic.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
The precursor of an enzyme, requiring some change (usually the hydrolysis of an inhibiting fragment that masks an active grouping) to render it active; for example, pepsinogen, trypsinogen, profibrolysin.
Farlex Partner Medical Dictionary © Farlex 2012
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
The precursor of an enzyme, requiring some change (usually the hydrolysis of an inhibiting fragment that masks an active grouping) to render it active, e.g., pepsinogen, trypsinogen, profibrinolysin.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
zymogenThe inactive protein precursor of an ENZYME.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
zymogenan inactive precursor of an enzyme, particularly those concerned with protein digestion, for example, PEPSINOGEN and TRYPSINOGEN. Zymogens require ACTIVATION ENERGY to become functional.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005