according to the method devised by de duve a sediment rich in lysosomes was produced by fractionated centrifugation and subsequently the enzyme activity of beta-glucuronidase , beta-acetylglucosaminidase , cathepsin d and a collagenolytic enzyme was measured in the sediment as well as in the corresponding lysosomal supernatant .
C0024369
lysosomes
C0007427
cathepsin d