Journal of General Virology

Fig. 1. Phylogenetic tree of the H3 HA gene of influenza A viruses. The tree is rooted to the H2 HA gene of Pintail/Praimoric/625/76 (H2N2) and is based on 628 bp (residues 439–1066). Horizontal lines are proportional to the numbers of nucleotide substitutions between branch points. Underlined viruses indicate those that were sequenced in this study. Abbreviations of virus sequences are as follows: Ck/It/5945/95, A/Chicken/Italy/5945/95 (H3N2); Dk/Uk/63, A/Duck/Ukraine/1/63 (H3N8); Eq/Jil/89, A/Equine/Jilin/1/89 (H3N8); Dk/Ho/80, A/Duck/Hokkaido/8/80 (H3N8); Dk/Ho/85, A/Duck/Hokkaido/10/85 (H3N8); Sw/It/83, A/Swine/Italy/309/83 (H3N2); Sw/It/85, A/Swine/Italy/520/85 (H3N2); Sw/It/87, A/Swine/Italy/635/87 (H3N2); Sw/Ukk/84, A/Swine/Ukkel/1/84 (H3N2); Sw/Be/94, A/Swine/Belgium/231/94 (H3N2); Sw/It/25823/94, A/Swine/Italy/25823/94 (H3N2); Sw/Oerd/96, A/Swine/Oerdenrode/70/96 (H3N2); Neth/93, A/Netherland/5/93 (H3N2); Vict/75, A/Victoria/3/75 (H3N2); Tex/77, A/Texas/1/77 (H3N2); Sydney/97, A/Sydney/5/97 (H3N2); Vict/89, A/Victoria/5/89 (H3N2); PChal/73, A/PortChalmers/1/73 (H3N2); NT/68, A/Northern Territory/60/68 (H3N2); Eq/Font/76, A/Equine/Fontainebleau/76 (H3N8); Eq/Mia/63, A/Equine/Miami/1/63 (H3N8). The sequence for influenza virus Tex/1/77 is taken from C. Bender and N. Cox (unpublished data; accession no. ISDNTX77).

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