A preliminary characterization of a fibrinolytic inhibitor released by human umbilical
vein endothelial cells in primary culture is reported. This molecule of Mr comprised
between 2 × 105 and 106 and of μ2 mobility precipitates at 43% ammonium sulphate saturation and is totally adsorbed
on Concanavalin A Sepharose 4 B. A possible relationship with a macroglobulins is
discussed.
Key words
Fibrinolysis inhibition - Urokinase - Endothelial cells - Umbilical vein