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. 2013 Dec 27;45(4):375–386. doi: 10.3947/ic.2013.45.4.375

Figure 1.

Figure 1

Phylogenetic tree of hemagglutinin (HA) of influenza A and B viruses. Phylogeny was generated based on amino acid sequences of HA of influenza A (H1-H18) and B viruses. Representative viruses were chosen in GenBank and sequence alignment was performed using Clustal W. MEGA 5 software was used to construct the phylogenetic tree.