title: Acid sensitivity of the influenza virus hemagglutinin.
abstract: Influenza virus hemagglutinin was shown to be acid resistant if precipitates which form during acidification are first removed. Adsorption of virus to precipitates formed during acidification may cause a virus to be described incorrectly as acid sensitive.
mesh_terms: D000327:Adsorption; D000645:Ammonium Sulfate; D000818:Animals; D001826:Body Fluids; D011232:Chemical Precipitation; D002642:Chick Embryo; D004352:Drug Resistance, Microbial; D005321:Extraembryonic Membranes; D006386:Hemagglutination Tests; D006389:Hemagglutinins, Viral; D006851:Hydrochloric Acid / Q000494:pharmacology; D006863:Hydrogen-Ion Concentration; D008278:Magnesium Sulfate; D009975:Orthomyxoviridae / Q000187:drug effects / Q000254:growth & development / Q000276:immunology*; D012964:Sodium; D013431:Sulfates
chemical_list: D006389:Hemagglutinins, Viral; D013431:Sulfates; D008278:Magnesium Sulfate; D012964:Sodium; D006851:Hydrochloric Acid; D000645:Ammonium Sulfate