Used for the quantitative measurement of urokinase (UK) activity in rat biological samples such as plasma, serum, or tissue extracts. This ELISA kit enables researchers to assess fibrinolytic activity in experimental models related to thrombosis, inflammation, and tissue remodeling. It is commonly applied in preclinical studies to evaluate the effects of drugs or disease states on the plasminogen activation system. The assay is useful in cardiovascular research, cancer studies involving cell invasion, and renal or neurological disorders where proteolytic activity plays a role. High sensitivity and specificity allow detection of active urokinase without cross-reactivity to other proteases.