[proh-en-zahym] 
| any of a group of proteins that are converted to active enzymes by partial breakdown, as by the action of an acid or other enzyme. |
[zahy-muh-juh
n, -jen] | any of various enzyme precursor molecules that may change into an enzyme as a result of catalytic change. |
| pro·en·zyme (prō-ěn'zīm') n. The inactive or nearly inactive precursor of an enzyme, converted into an active enzyme by proteolysis. Also called zymogen. |
proenzyme pro·en·zyme (prō-ěn'zīm')
n.
The inactive or nearly inactive precursor of an enzyme, converted into an active enzyme by proteolysis. Also called zymogen.
zymogen zy·mo·gen (zī'mə-jən)
n.
See proenzyme.