title: Localization of RNA tumor virus polypeptides. I. Isolation of further virus substructures.
mesh_terms: D001354:Avian Leukosis Virus / Q000032:analysis*; D002499:Centrifugation, Density Gradient; D002845:Chromatography; D002850:Chromatography, Gel; D004591:Electrophoresis, Polyacrylamide Gel; D005622:Friend murine leukemia virus / Q000032:analysis*; D006023:Glycoproteins / Q000032:analysis; D007457:Iodine Radioisotopes; D008854:Microscopy, Electron; D008970:Molecular Weight; D009698:Nucleoproteins / Q000032:analysis / Q000302:isolation & purification; D010455:Peptides / Q000032:analysis / Q000302:isolation & purification*; D010772:Phosphotungstic Acid; D013194:Staining and Labeling; D013501:Surface-Active Agents; D014764:Viral Proteins / Q000032:analysis / Q000302:isolation & purification*
chemical_list: D006023:Glycoproteins; D007457:Iodine Radioisotopes; D009698:Nucleoproteins; D010455:Peptides; D013501:Surface-Active Agents; D014764:Viral Proteins; D010772:Phosphotungstic Acid