title: Serum protective factor: an antiviral humoral substance produced in vivo--identification and mechanism of action.
mesh_terms: D000645:Ammonium Sulfate; D000818:Animals; D000888:Antibodies, Anti-Idiotypic; D000914:Antibodies, Viral / Q000032:analysis; D000998:Antiviral Agents / Q000302:isolation & purification / Q000502:physiology* / Q000627:therapeutic use; D002478:Cells, Cultured; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D002850:Chromatography, Gel; D051379:Mice; D014461:Ultracentrifugation; D014777:Virus Diseases / Q000628:therapy; D005719:gamma-Globulins / Q000276:immunology
chemical_list: D000888:Antibodies, Anti-Idiotypic; D000914:Antibodies, Viral; D000998:Antiviral Agents; D005719:gamma-Globulins; D000645:Ammonium Sulfate