[ ahy-suh-zahym ]
/ ˈaɪ səˌzaɪm /

noun Biochemistry.

any of the genetically variant forms of certain enzymes that catalyze the same reaction but that may differ in activity, composition, or physical properties.

Origin of isozyme

First recorded in 1955–60; iso- + (en)zyme
Also called isoenzyme. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for isozyme


/ (ˈaɪsəʊˌzaɪm) /


any of a set of structural variants of an enzyme occurring in different tissues in a single speciesAlso called: isoenzyme

Derived Forms

isozymic (ˌaɪsəʊˈzaɪmɪk, -ˈzɪm-), adjective

Word Origin for isozyme

from iso- + (en) zyme
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for isozyme


[ īsə-zīm′ ]


Any of a group of enzymes that are similar in catalytic properties but are differentiated by variations in physical properties, such as isoelectric point.isoenzyme
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.