title: Characterization and chemical nature of Haemophilus avium hemagglutinin.
abstract: Haemophilus avium hemagglutinin properties were studied. Hemagglutination titer was decreased by proteolytic enzyme treatments, but was not affected by glycosidase, lipase, phospholipase, and neuraminidase treatments. Cell-free hemagglutinin was found in supernatants of centrifuged sonicate and centrifuged agitate of H avium and was precipitated with ammonium sulfate with no loss of hemagglutinating activity. The H avium hemagglutinin showed different patterns of activity against the RBC of different avian species. Hemagglutination of chicken RBC was not inhibited by D-mannose.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D006190:Haemophilus / Q000032:analysis* / Q000276:immunology; D006388:Hemagglutinins / Q000302:isolation & purification*
chemical_list: D006388:Hemagglutinins