The Role of Lys-Plasminogen in Cell-Mediated Plasmin Production
A key control point by which the activity of plasmin is positively regulated is by localizing Glu-plasminogen (the native circulating form of the plasminogen molecule) to specific binding sites on cell surfaces. Glu-plasminogen is activated much more efficiently when bound to cells than when in solution. Upon activation, plasmin remains associated with the cell surface where plasmin activity is relatively protected from inhibitors. Furthermore, the enzymatic activity of plasmin is enhanced in the milieu of the cell surface.
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