Definition of "isoenzyme" [isoenzyme]

• Any of the chemically distinct forms of an enzyme that perform the same biochemical function. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The inducible phase II enzyme HO-1, together with the constitutively expressed isoenzyme HO-2, degrades free heme into three products: carbon monoxide (CO), biliverdin (which is rapidly converted to bilirubin), and free iron"
• "Make active your pregency and phenergan knows that you are occurring this isoenzyme if you have sick meals of supine potential as cough or lower present pain, cramping, or soreness."
• "The isoenzyme IMPDH2 predominates in activated lymphocytes, and its inhibition by MPA is part of standard immunosuppressive regimens."