Centrifugation, IsopycnicCentrifugation, Density GradientMetrizamideCell FractionationCentrifugation, ZonalCentrifugationCesiumMicroscopy, ElectronAcid PhosphataseSubcellular FractionsTritiumLysosomesNucleotidasesHydrolasesMolecular WeightCell MembraneThymidineCarbon IsotopesLiverElectrophoresis, Polyacrylamide GelDNACell LinePovidoneDiatrizoateSucrose