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. 2009 Aug 5;47(10):3294–3300. doi: 10.1128/JCM.00355-09

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FIG. 2. — Phylogenetic trees of the PB2 (positions 32 to 2228), PB1 (positions 182 to 1080), PA (positions 23 to 1257), M (positions 270 to 765), NP (positions 2 to 1445), and NS (positions 34 to 693) genes of the H9N2 avian influenza viruses in Shanghai, China, in 2002 and from 2006 to 2008. The method used is described in the legend to Fig. 1. Virus abbreviations are defined in the legend to Fig. 1.

FIG. 2. — Phylogenetic trees of the PB2 (positions 32 to 2228), PB1 (positions 182 to 1080), PA (positions 23 to 1257), M (positions 270 to 765), NP (positions 2 to 1445), and NS (positions 34 to 693) genes of the H9N2 avian influenza viruses in Shanghai, China, in 2002 and from 2006 to 2008. The method used is described in the legend to Fig. 1. Virus abbreviations are defined in the legend to Fig. 1.