activator : Idioms & Phrases
plasminogen activator
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noun protease produced in the kidney that converts plasminogen to plasmin and so initiates fibrinolysis
urokinase.
WordNet
tissue plasminogen activator
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noun a thrombolytic agent (trade name Activase) that causes fibrinolysis at the site of a blood clot; used in treating acute myocardial infarction
Activase.