title: Tissue-culture fractionation. Zonal centrifugation of Lettrée cells homogenized by glycerol-induced lysis: subfractionation of membranes in sucrose gradients.
abstract: 1. Lettrée cells were grown intraperitoneally in MF-1 mice. 2. Cells that were loaded with glycerol were swollen in 0.1 M-sucrose and disrupted by Dounce homogenization. 3. Early-passage Lettrée cells were more easily disrupted than late-passage cells by this method, and the former produced larger fragments of plasma membrane. 4. The membranes were fractionated initially in sucrose gradients (on the basis of sedimentation rate) in a BXIV zonal rotor. 5. Fractions from this gradient were further resolved in isopycnic sucrose gradients. 6. Plasma-membrane and endoplasmic-reticulum fractions were recovered in good yield and high purity.
mesh_terms: D000818:Animals; D001202:Ascitic Fluid / Q000166:cytology; D002458:Cell Fractionation; D002462:Cell Membrane / Q000201:enzymology; D002478:Cells, Cultured; D002500:Centrifugation, Isopycnic; D002501:Centrifugation, Zonal; D005990:Glycerol; D051379:Mice; D013347:Subcellular Fractions / Q000201:enzymology
chemical_list: D005990:Glycerol