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. Author manuscript; available in PMC: 2010 Feb 1.
Published in final edited form as: J Clin Virol. 2008 Dec 10;44(2):141–144. doi: 10.1016/j.jcv.2008.10.011

Fig. 2.

Fig. 2

Phylogenetic trees for the H3N2 HA, PA, M and NS genes of influenza A viruses. Analysis was based on the nucleotide sequences in open reading frames of the HA, PA, M and NS gene. Trees were generated with the MAGA program (version 3.1) by using neighbor-joining analysis.