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Stereoview of structural comparison of the putative RBS of H17 HA (in green side chains and yellow Cα carbons) with the H1 HA from A/California/04/2009 (H1N1) (in gray; PDB ID code 3UBQ) after superimposing the RBS subdomain. The overall structures are all superimposable, including Trp153, His183, and Tyr195, as well as Leu194, in the base of the RBS. Other key residues are substituted between H17 HA and H1 HA, and are labeled in green for H17 HA and in gray for H1 HA.
