Figure 4.

Stereoscopic view of the aligned structural models of pandemic and non-pandemic NA proteins. The major difference between these two partial models (covering residues 83-467) is highlighted and is due to one amino acid difference at position 149.

Abdussamad and Aris-Brosou BMC Evolutionary Biology 2011 11:6   doi:10.1186/1471-2148-11-6
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