Regions involved in binding of urokinase-type-1 inhibitor complex and pro-urokinase to the endocytic alpha 2 macroglobulin receptor/low density lipoprotein receptor-related protein. Evidence that the urokinase receptor protects pro-urokinase against binding to the endocytic receptor. - Nykjaer,A.; Kjoller,L.; Cohen,R.L. (J Biol Chem, 1994)