Print Email Facebook Twitter The role of lysosomal enzymes in protein degradation in different types of rat liver cells Title The role of lysosomal enzymes in protein degradation in different types of rat liver cells Author Knook, D.L. Instituut voor experimentele gerontologie TNO Publication year 1977 Abstract Highly purified suspensions of parenchymal, endothelial and Kupffer cells were prepared from the rat liver. The respective roles of these cell classes in the degradation of proteins was investigated by analysing the cellular distribution of two lysomal proteases. The specific arginine naphthylamidase activity was 2 times higher in Kupffer cells compared with the nearly equal activities in endothelial and parenchymal cells. The specific activity of the important endopeptidase cathepsin D in endothelial and Kupffer cells was about 12 and 36 times higher, respectively, than the activity in parenchymal cells. These results are in agreement with an important role of Kupffer and endothelial cells in the degradation of proteins and protein containing material of exogenous origin. Chemicals/CAS: Amino Acid Naphthylamidases, EC 3.4.11.; Arginine, 74-79-3; Cathepsins, EC 3.4.-; Peptide Hydrolases, EC 3.4 Subject Amino Acid NaphthylamidasesAnimalArginineCathepsinsComparative StudyFemaleKupffer CellsLiverLysosomesPeptide HydrolasesRats To reference this document use: http://resolver.tudelft.nl/uuid:8a7989d4-8a62-4a2c-b1b4-192a13a14f8f TNO identifier 228300 ISSN 0001-5318 Source Acta Biologica et Medica Germanica, 36 (11-12), 1747-1752 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.