title: Defectiveness of a feline sarcoma virus demonstrable by the acquisition of a new envelope antigenic type by phenotypic mixing.
mesh_terms: D000818:Animals; D000956:Antigens, Viral; D002213:Capsid / Q000096:biosynthesis* / Q000276:immunology; D002415:Cats; D002471:Cell Transformation, Neoplastic; D006023:Glycoproteins / Q000096:biosynthesis* / Q000276:immunology; D006378:Helper Viruses / Q000378:metabolism*; D005256:Leukemia Virus, Feline / Q000276:immunology / Q000378:metabolism*; D009858:Oncogenic Viruses / Q000276:immunology / Q000378:metabolism*; D014764:Viral Proteins / Q000096:biosynthesis*
chemical_list: D000956:Antigens, Viral; D006023:Glycoproteins; D014764:Viral Proteins