title: The env-gene of the spleen focus-forming virus lacks expression of p15(E) determinants.
mesh_terms: D003673:Defective Viruses / Q000187:drug effects / Q000235:genetics* / Q000276:immunology; D000939:Epitopes; D005622:Friend murine leukemia virus / Q000187:drug effects / Q000235:genetics* / Q000276:immunology; D017988:Gammaretrovirus / Q000235:genetics / Q000276:immunology; D005814:Genes, Viral; D006023:Glycoproteins / Q000235:genetics / Q000276:immunology*; D009844:Oligosaccharides / Q000032:analysis; D014415:Tunicamycin / Q000494:pharmacology; D014759:Viral Envelope Proteins; D014764:Viral Proteins / Q000235:genetics / Q000276:immunology*
chemical_list: D000939:Epitopes; D006023:Glycoproteins; D009844:Oligosaccharides; D014759:Viral Envelope Proteins; D014764:Viral Proteins; D014415:Tunicamycin