title: The Friend spleen focus-forming virus (SFFV) genome: fractionation and analysis of SFFV and helper virus-related sequences.
mesh_terms: D001483:Base Sequence; D005622:Friend murine leukemia virus / Q000235:genetics*; D005814:Genes, Viral; D006378:Helper Viruses / Q000235:genetics*; D009052:Leukemia Virus, Murine / Q000235:genetics*; D009693:Nucleic Acid Hybridization; D012367:RNA, Viral / Q000032:analysis / Q000235:genetics*
chemical_list: D012367:RNA, Viral