Figure 2.

Stereo diagrams showing the positions (represented as spheres) of the pyranose ring centroid relative to the aromatic residue in the 51 saccharide–protein complexes. Large spheres denote the positions observed in galactose–protein complexes, whereas small spheres denote those observed in glucose– or mannose–protein complexes. (A) The positions observed in proteins that have tryptophan in the binding site are shown with reference to 3-methylindole. (B) The positions observed in proteins that have a tyrosine or phenylalanine in the binding site are shown with reference to toluene.