title: Evidence for helper-independent murine sarcoma virus. II. Differences between the ribonucleic acids of clone-purified leukemia virus, helper-independent and helper-dependent sarcoma viruses.
mesh_terms: D000818:Animals; D001854:Bone Marrow Cells; D002460:Cell Line; D004591:Electrophoresis, Polyacrylamide Gel; D006378:Helper Viruses; D051379:Mice; D008970:Molecular Weight; D008979:Moloney murine leukemia virus / Q000032:analysis*; D009691:Nucleic Acid Denaturation; D010761:Phosphorus Radioisotopes; D012367:RNA, Viral / Q000032:analysis* / Q000302:isolation & purification; D013950:Thymus Gland / Q000196:embryology; D014316:Tritium
chemical_list: D010761:Phosphorus Radioisotopes; D012367:RNA, Viral; D014316:Tritium