title: The large P proteins of influenza A viruses are composed of one acidic and two basic polypeptides.
mesh_terms: D002213:Capsid / Q000032:analysis; D004591:Electrophoresis, Polyacrylamide Gel; D006863:Hydrogen-Ion Concentration; D009980:Influenza A virus / Q000032:analysis*; D010455:Peptides / Q000032:analysis; D014764:Viral Proteins / Q000032:analysis*
chemical_list: D010455:Peptides; D014764:Viral Proteins