"The activation by u-PA was enhanced by 2.86 microg/ml of S-2 4-6-fold by of 32.4 mmol/l of lysine or 5.4 mmol/l of 6-aminohexanoic acid and 14-16-fold enhancement by addition of both S-2 and lysine or S-2 and 6-AH showing a synergistic effect."xsd:string