Figure 5. Close up on active sites structures of GEs with bound ligands in green sticks and binding/active site residues in purple sticks.

(A) Structure of StGE2 nucleophile mutant in complex with Me-4-O-MeGlcA (PDB code: 4G4J). Hydrogen bonds are highlighted. (B) Structure of OtCE15A in complex with XUX (2²-(4-O-methyl-α-d-glucuronyl)-xylotriose) (PDB code: 6T0I) (C) Structure of CuGE in complex with 4-O-methyl-d-glucuronyl-alpha-d-xylotetraitol (PDB code: 6RV9). Panels (B and C) are shown in same orientation.