Figure 1From: Evolution of the M gene of the influenza A virus in different host species: large-scale sequence analysisPhylogenetic trees for the M gene. Figures shows phylogenetic trees constructed using RAxML. Scale bar shows evolutionary distance inferred by RAxML algorithm. Trees are shaded in colors according to host (A), subtype (B), year (C), geographical location (D), and H5N1 (E). To compare evolutionary characteristics such as evolution rate and selective pressure, we named each lineage as shown in (F).Back to article page