Detailed structural analysis of glycosidase/inhibitor interactions: Complexes of Cex from Cellulomonas fimi with xylobiose-derived aza-sugars

{Detailed insights into the mode of binding of a series of tight-binding aza-sugar glycosidase inhibitors of two fundamentally different classes are described through X-ray crystallographic studies of complexes with the retaining family 10 xylanase Cex from Cellulomonas fimi. Complexes with xylobiosederived aza-sugar inhibitors of the substituted ``amidine{''} class (xylobio-imidazole