Studies on the origin of pandemic influenza. II. Peptide maps of the light and heavy polypeptide chains from the hemagglutinin subunits of A 2 influenza viruses isolated before and after the appearance of Hong Kong influenza.

Amino Acid Sequence Centrifugation, Density Gradient Chromatography, Paper Disease Outbreaks/microbiology Dithiothreitol Electrophoresis, Disc Genetics, Microbial Guanidines Hemagglutinins, Viral/analysis,isolation & purification Hong Kong Humans Influenza, Human/microbiology Mutation Orthomyxoviridae/analysis,immunology,isolation & purification Peptides/analysis,isolation & purification Recombination, Genetic Trypsin Virus Cultivation

Guanidines Hemagglutinins, Viral Peptides Trypsin Dithiothreitol