Interaction between plasminogen activator inhibitor 1 (PAI-1) bound to fibrin and either tissue-type plasminogen activator (t-PA) or urokinase-type plasminogen activator (u-PA). Binding of t-PA/PAI-1 to fibrin is mediated by both the finger and the kringle-2 domain of t-PA - Wagner, O F; de Vries, C; Hohmann, C; Veerman, H; Pannekoek, H (J Clin Invest, 1989)