Antigenic properties and protective capacity of a cyclic peptide corresponding to site A of influenza virus haemagglutinin.


Two cyclic peptide analogues corresponding to residues 139-146 (site A) of influenza A virus haemagglutinin (strain X31) were synthesized. The ability of these peptides to react with anti-influenza virus antibodies was found to depend on the conformation of the loop and on the orientation in which the peptide was presented to antibodies. Antibodies raised… (More)


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