Figure 6From: Evolutionary genomics of the pandemic 2009 H1N1 influenza viruses (pH1N 1v)Comparisons of d N / d S ratios among 2009 H1N1, swine and human viruses. Blue showed 2009 H1N1 viruses; red and green indicated swine and human viruses, respectively. The dN/dS ratio estimate could not be performed for NS1 gene of 2009 H1N1 viruses because only few variable amino acid sites are available.Back to article page