Journal of General Virology

Fig. 2. Phylogenetic tree of the HA genes of H5 influenza viruses. The cladogram was constructed by using complete nucleotide coding sequences of the HA1 subunit. The tree was rooted to the H2 HA1 sequence of Pintail/Praimoric/625/76 (H2N2). Sequences were analysed with the Fitch program, PHYLIP (the PHYLogeny Inference Package) version 3.57c. Virus names and abbreviations are given in Table 1 or can be found in Zhou et al. (1999) or in GenBank by using the following accession numbers: U20475, AF144305, AF046096, U37166, U79455, U28919, U79454, U79452, M10243, U79451.

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