Volume 16, Number 2—February 2010
Dispatch
Extensive Mammalian Ancestry of Pandemic (H1N1) 2009 Virus
Figure
![Receptor specificity of human, pandemic, swine, and avian H1 influenza viruses. Association constants (Kass, 1/μM sialic acid) of virus complexes with sialylglycopolymers conjugated to 3′-sialyllactose (avian-like Neu5Acα2,3Gal-containing receptor, white bars) and 6′-sialyllactosamine (human-like Neu5Acα2,6Gal-containing receptor, black bars). Higher Kass values indicate stronger binding. Values are the mean ± SD of 4 independent experiments (1/μM sialic acid). 1, A/Brisbane/59/2007; 2, A/New Je](/eid/images/09-1141-F1.jpg)
Figure. Receptor specificity of human, pandemic, swine, and avian H1 influenza viruses. Association constants (Kass, 1/μM sialic acid) of virus complexes with sialylglycopolymers conjugated to 3′-sialyllactose (avian-like Neu5Acα2,3Gal-containing receptor, white bars) and 6′-sialyllactosamine (human-like Neu5Acα2,6Gal-containing receptor, black bars). Higher Kass values indicate stronger binding. Values are the mean ± SD of 4 independent experiments (1/μM sialic acid). 1, A/Brisbane/59/2007; 2, A/New Jersey/15/2007; 3, A/California/04/2009; 4, A/Tennessee/1-560/2009; 5, A/swine/North Carolina/007270/2008; 6, A/swine/Iowa/003479/2009; 7, A/mallard/Alberta/66/2007; 8, A/mallard/Alberta/496/2008.
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