The enzyme protein-glucosylgalactosylhydroxylysine glucosidase catalyzes the following chemical reaction: [collagen]--5-O-[α-D-glucosyl--β-D-galactosyl]-5-hydroxy-L-lysine + H2O = D-glucose + [collagen]--5-O--5-hydroxy-L-lysineIt belongs to the family of hydrolases, specifically those glycosidases that hydrolyse O- and S-glycosyl compounds. Wikipedia