
1) Organic compound 2) Zymogen
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https://www.crosswordclues.com/clue/proenzyme

1) Zymogen
Found on
https://www.crosswordclues.com/clue/proenzyme

<biochemistry> A precursor of an enzyme that does not have full (or any) function until an inhibitory sequence has been removed. ... This usually requires hydrolysis or limited {proteolysis of an inhibiting fragment that masks an active grouping) to render it active. ... Examples include pepsinogen, trypsinogen, profibrolysin. ... Synonym: zy...
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http://www.encyclo.co.uk/local/20973

(pro-en´zīm) zymogen; an inactive precursor of an enzyme.
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http://www.encyclo.co.uk/local/21001

Type: Term Pronunciation: prō-en′zīm Definitions: 1. The precursor of an enzyme, requiring some change (usually the hydrolysis of an inhibiting fragment that masks an active grouping) to render it active; pepsinogen, trypsinogen, profibrolysin. Synonyms: zymogen
Found on
http://www.medilexicon.com/medicaldictionary.php?t=72558

[
n] - 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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http://www.webdictionary.co.uk/definition.php?query=proenzyme

proenzyme The inactive form of an enzyme found within a cell, which, upon leaving the cell, is converted into the active form; such as, pepsinogen, which is converted to pepsin.
Found on
http://www.wordinfo.info/words/index/info/view_unit/2354/

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. Also called
Found on
https://www.infoplease.com/dictionary/proenzyme
No exact match found.