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[Peptide mapping of the monoclonal antibodies against the heavy chain hemagglutinin from influenza virus H3N2].

Interaction of the synthetic peptides corresponding to the regions 122-133, 136-147, 154-164 and 314-328 of the virus A/Aichi/2/68 hemagglutinin heavy chain with monoclonal antibodies specific for this hemagglutinin was assayed in a variety of tests, e.g., ELISA, competition RIA, hemagglutinin-inhibition and virus-neutralization assays. The monoclonal antibody 152 reacted with the area 136-147 (epitope A), three monoclonal antibodies 3, 19 and 63 reacted exclusively with the area (154-164) Glu (epitope B). Mapping of two monoclonal antibodies IV A1 and IV G6 specific for the influenza virus A/Dunedin/ 4/73 hemagglutinin heavy chain and cross-reacting with a number of the H3 subtype viruses was carried out. The specificity of the interaction of the conservative peptide H3(314-328) with monoclonal antibodies IV A1 and IV G6 was confirmed by competition RIA and by competition hemagglutinin inhibition and virus neutralization.