the kinetics of the hydrolysis of a series of peptide substrates at a single peptide bond ( between l-phenylalanyl and l-phenylalanyl ) by the acid proteinases gastric pepsin a ( ec 3.4.23.1 ) , rhizopus pepsin ( ec 3.4.23.9 ) , and beef-spleen cathepsin d ( ec 3.4.23.5 ) have been determined by use of the fluorescamine assay method .
C0020291
hydrolysis
C0007427
cathepsin d