Is a quantification of plasminogen activator inhibitor 1 a serine protease inhibitor. This inhibitor acts as 'bait' for tissue plasminogen activator, urokinase, protein C and matriptase-3/TMPRSS7. Its rapid interaction with PLAT may function as a major control point in the regulation of fibrinolysis. The trait is EFO_0004792 (plasminogen activator inhibitor 1 measurement). Also known as: PAI-1 measurement, PAI1 measurement.