title: [In vitro transmission of mouse leukemia virus to restrictive mouse cells: necessity for mixed infection by two different leukemia viruses].
abstract: The plaque formation of murine leukemia virus (MuLV) in non permissive mouse cells (N-tropic MuLV in B-type cells, or B-tropic MuLV in N-type cells) was increased by murine sarcoma virus whose plaque-forming activity was extremely low (MuSV XC-). The infection of N-tropic MuLV in B-type cells was increased by MuSV XC- propagated only in N-type cells but not in B-type cells, and the infection of B-tropic MuLV in N-type cells by MuSV XC- propagated only in B-type cells but not in N-type cells.
mesh_terms: D002460:Cell Line; D005622:Friend murine leukemia virus / Q000254:growth & development*; D017988:Gammaretrovirus / Q000254:growth & development*; D005838:Genotype; D009052:Leukemia Virus, Murine / Q000254:growth & development*; D009053:Sarcoma Viruses, Murine / Q000254:growth & development*
vernacular_title: Transmission in vitro du virus leucémique de la souris â des cellules restrictives de souris: nécessité d'une infection mixte par deux virus leucémiques différents