chemical modification of human degraded form of plasminogen with nh2-terminal lysine ( lys-plasminogen ) and the elastase fragments kringle 1 + 2 + 3 and kringle 4 with the tryptophan reagent [ 14c ] dimethyl ( 2-hydroxy-5-nitrobenzyl ) sulfonium bromide results in the incorporation of label and the parallel loss of lysine binding ability .
C0032140
plasminogen
C0064417
kringle