Figure 2
From: Subtype-specific structural constraints in the evolution of influenza A virus hemagglutinin genes
Independent covariation events (red) in the homologous hairpins predicted in the H7 and H10 HA segments.
The hairpins in the representative strains of Eurasian and American branches of H7 and H10 subtypes are shown together with the homologous hairpin in the H15 HA segment.
