title: A complement fixing antigen in the livers of birds infected with an avian leukovirus (erythroblastosis virus).
abstract: Extracts of erythroblastosis affected livers from which much of the structural protein had been removed were prepared by acid denaturation. These extracts contained complement fixing "soluble" antigen in a form which was not associated with viral or subviral particles. Ultracentrifugation can be of assistance in separating complement fixation activity from contaminating material in these extracts.
mesh_terms: D001355:Alpharetrovirus / Q000276:immunology*; D000818:Animals; D000956:Antigens, Viral / Q000032:analysis*; D001353:Avian Leukosis / Q000276:immunology*; D001354:Avian Leukosis Virus / Q000276:immunology*; D002645:Chickens; D003168:Complement Fixation Tests; D008099:Liver / Q000032:analysis*; D011201:Poultry Diseases / Q000276:immunology*
chemical_list: D000956:Antigens, Viral