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Figure 3.
Fig. 3. Atomic interactions between H5, H9, and H3 HAs
and sialosides. (a) Potential hydrogen bonds (dashed red)
between LSTc and the swine H9 HA. (b) Comparison of the binding
of LSTc (  2,6) with
the 1999 swine H9 (red) and 1968 human H3 (blue) subtype HA.
Purple circles, common contacts; blue, H3 contacts; red, H9
contacts. (c) Comparison of the binding of LSTa ( 2,3) with
the 1997 avian H5 (green), 1999 swine H9 (red), and 1968 human
H3 (blue) subtype HAs. Purple circles, common contacts; blue, H3
contacts; green, H5 contacts; red, H9 contacts.
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