title: Genome organization of retroviruses IX. Analysis of the genomes of Friend spleen focus-forming (F-SFFV) and helper murine leukemia viruses by heteroduplex-formation.
mesh_terms: D001483:Base Sequence; D005622:Friend murine leukemia virus / Q000235:genetics*; D005814:Genes, Viral; D009052:Leukemia Virus, Murine / Q000235:genetics*; D008979:Moloney murine leukemia virus / Q000235:genetics*; D009692:Nucleic Acid Heteroduplexes; D012367:RNA, Viral / Q000032:analysis / Q000235:genetics*
chemical_list: D009692:Nucleic Acid Heteroduplexes; D012367:RNA, Viral