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Model of blood group A antigen binding
A. Glycerol molecules cluster around the active site of the GalNAc ligand. B. Galactose and glycerol molecules bound near the active site when galactose is soaked into the active site. C. A docked model of the blood group A antigen bound to the active site, where the locations of the atoms in the model mimic the position of the small molecules bound around the active site of the crystal structures in panels A and B.
