title: Structural and functional studies of the Friend spleen focus-forming virus: structural relationship of SFFV to dualtropic viruses and molecular cloning of a biologically active subgenomic fragment of SFFV DNA.
mesh_terms: D000818:Animals; D003001:Cloning, Molecular; D004279:DNA, Viral / Q000096:biosynthesis*; D003673:Defective Viruses / Q000235:genetics*; D005622:Friend murine leukemia virus / Q000235:genetics* / Q000648:ultrastructure; D005814:Genes, Viral; D051379:Mice; D008907:Mink / Q000382:microbiology; D009693:Nucleic Acid Hybridization; D012367:RNA, Viral / Q000032:analysis; D014162:Transfection
chemical_list: D004279:DNA, Viral; D012367:RNA, Viral