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Plasminogen is the inactive precursor to plasmin, an enzyme found in blood plasma and serum. Plasmin plays a crucial role in the body's natural process of dissolving blood clots, known as fibrinolysis.123

When a blood vessel is injured, a fibrin clot forms to stop bleeding. Plasmin, derived from plasminogen, breaks down this fibrin clot as part of the healing process. Certain drugs, like streptokinase, urokinase, and tissue plasminogen activator (t-PA), can activate plasminogen to help dissolve existing clots, which is important in treating conditions like heart attacks and pulmonary embolisms.234

Deficiencies in plasminogen can be associated with a tendency to form clots inappropriately, known as thrombosis.4

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