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尿激酶型纤溶酶原激活剂 (u_PA)主要是由无酶催化活性的单链酶原 (scu_PA或pro_UK)和具有激活纤溶酶原 (plas minogen)活性的双链尿激酶 (tcu_PA或UK)组成。scu_PA只激活吸附在纤维蛋白表面的纤溶酶原 ,具有选择性溶栓作用[1] 。scu_PA由 411个氨基酸组成 ,可被体内纤溶酶或激
Urokinase-type plasminogen activator (u_PA) is mainly composed of enzymatically inactive single-chain pro-enzymes (scu_PA or pro_UK) and double-chain urokinase with activated plasminogen activator (tcu_PA or UK )composition. scu_PA activated only on the surface of fibrin plasminogen, with selective thrombolysis [1]. The scu_PA consists of 411 amino acids and can be plasmin or stimulated in vivo