FIG 3.

Structures of MuV-HN in complex with SLe^X pentaose or GM2-GS superimposed on the MuV-HN − 3′-SL complex. (A) Crystal structures of the SLe^X pentaose-bound and the GM2-GS-bound MuV-HN proteins superimposed on the 3′-SL -bound MuV-HN. Only the main chains of the MuV-HN proteins are shown. (B) Crystal structures of the MuV-HN-bound SLe^X pentaose and the MuV-HN-bound GM2-GS superimposed on the MuV-HN-bound 3′-SL. Right and left are the views of each rotated by 180°. Superimposition was performed for the core trisaccharide structure containing α2,3-linked sialic acid based on the root mean square deviation.