Figure 4. Selective constraint strengths for viral sites in Avian and Human influenza.

Strength of selective constraints (measured as d, as described in Eqn. 5), for viral sites identified (FDR<0.05) as under different selective constraints in avian and human hosts. Colour coding refers to specific gene: HA (red), NA (blue), M1 (black), M2 (brown), NP (green), NS1 (orange), PA (cyan), PB1 (purple), PB2 (magenta). Selective sites are labelled.