Additional file 1.

Multiple sequence alignments of the PB2 segment. The Sequence collection, grouping, ordering, and alignment were all performed as elaborated in the methods section, and conserved regions and functional motifs of PB2 extracted from the alignment. Also, Logo bars of the conserved regions, the conservation percent of each conserved region, and average GC% were all carried out as elaborated in methods. Separation of the alignments into the four main host categories (human, swine, avian, and others) was conducted to facilitate comparative host analysis as elaborated in figures 1 and 2. The same applies to additional files 2, 3, 4, 5, and 6.

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ElHefnawi et al. Virology Journal 2011 8:44   doi:10.1186/1743-422X-8-44