title: Influenza A2 neuraminidases and their changes during persistance of viruses in tissue cultures.
mesh_terms: D046508:Culture Techniques; D006801:Humans; D007251:Influenza, Human; D009439:Neuraminidase / Q000032:analysis*; D009975:Orthomyxoviridae / Q000201:enzymology* / Q000276:immunology; D013045:Species Specificity
chemical_list: D009439:Neuraminidase