title: Properties of mouse leukemia viruses. VI. The core of Friend virus; isolation and constituents.
mesh_terms: D000406:AKR murine leukemia virus / Q000276:immunology; D000818:Animals; D002499:Centrifugation, Density Gradient; D004591:Electrophoresis, Polyacrylamide Gel; D005622:Friend murine leukemia virus / Q000276:immunology / Q000302:isolation & purification; D008854:Microscopy, Electron; D012367:RNA, Viral / Q000302:isolation & purification; D011817:Rabbits / Q000276:immunology; D013395:Sucrose; D014316:Tritium; D014529:Uridine
chemical_list: D012367:RNA, Viral; D014316:Tritium; D013395:Sucrose; D014529:Uridine