Defective Friend spleen focus-forming virus: pseudotype neutralization by helper-specific antisera.
D000818:Animals; D003673:Defective Viruses / Q000472:pathogenicity; D005622:Friend murine leukemia virus / Q000472:pathogenicity*; D006378:Helper Viruses / Q000276:immunology / Q000472:pathogenicity; D007106:Immune Sera; D007700:Kinetics; D007942:Leukemia, Experimental / Q000209:etiology*; D007945:Leukemia, Lymphoid / Q000382:microbiology; D008223:Lymphoma / Q000209:etiology*; D051379:Mice; D009500:Neutralization Tests; D013154:Spleen / Q000276:immunology
D007106:Immune Sera