Antigenic drift in the evolution of H1N1 influenza A viruses resulting from deletion of a single amino acid in the haemagglutinin gene, by N. J. McDonald, C. B. Smith and N. J. Cox
Journal of General Virology vol. 88, part 12, pp. 3209 - 3213
Supplementary Fig. S1. Amino acid alignments of (a) HA and (b) NA gene segments of the three H1N1 influenza A strains used in this study
Supplementary Fig. S2. Predicted surface charge distribution of A/Puerto Rico/8/1934 HA1 domain monomer with insertion of K134
Supplementary Table S1. Accession numbers of isolates used in this study
Supplementary Table S2. Microneutralization titres of H1N1 recombinant viruses bearing K134 insertion or deletion in the HA glycoprotein
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