... factor (HGF) andtissue-type plasminogen activator (tPA), whereas threerelated proteins: macrophage-stimulating protein (MSP),urokinase-type plasminogen activator (uPA), and pro-thrombin, appeared ... Plg, plasminogen; HGF, hepatocytegrowth factor; tPA, tissue-type plasminogen activator; uPA,urokinase-type plasminogen activator; MSP, macrophage-stimulating protein.(Received 26 July 2002, revised ... cells produce HGF activator, a 34-kDa serineprotease, that once it has been activated by thrombin, canprocess single-chain HGF [20]. Another pathway involvesthe plasminogen activators tPA and...