title: Immunogenic properties of the small chain HA2 of the haemagglutinin of influenza viruses.
abstract: The small chain of influenza virus haemagglutinin, HA2 was isolated by a selective enzymic removal of HA1 or by preparative SDS-polyacrylamide gel electrophoresis. Anti-HA2 specific antisera and monoclonal antibodies were subtype-specific in immunodiffusion tests and radioimmunoassays. These antibodies did not inhibit haemagglutination or haemolysis, did not prevent virus release, did not neutralize infectivity, and HA2 did not induce a protective immunity. HA2-specific antigenic determinants could not be demonstrated on the surface of infected cells. Lymphocytes from pre-immunized mice could not be stimulated by HA2 to exert a cytotoxic effect.
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000302:isolation & purification; D000914:Antibodies, Viral / Q000302:isolation & purification; D002642:Chick Embryo; D004591:Electrophoresis, Polyacrylamide Gel; D006385:Hemagglutination Inhibition Tests; D019267:Hemagglutinin Glycoproteins, Influenza Virus; D006389:Hemagglutinins, Viral / Q000276:immunology* / Q000302:isolation & purification; D006462:Hemolytic Plaque Technique; D007114:Immunization; D051379:Mice; D008807:Mice, Inbred BALB C; D008854:Microscopy, Electron; D009439:Neuraminidase / Q000037:antagonists & inhibitors; D009975:Orthomyxoviridae / Q000276:immunology*; D011817:Rabbits; D011863:Radioimmunoassay; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology / Q000382:microbiology
chemical_list: D000911:Antibodies, Monoclonal; D000914:Antibodies, Viral; D019267:Hemagglutinin Glycoproteins, Influenza Virus; D006389:Hemagglutinins, Viral; D009439:Neuraminidase