The enzyme 1,6-α-L-fucosidase catalyses the following chemical reaction Hydrolysis of 1,6-linkages between α-L-fucose and N-acetyl-D-glucosamine in glycopeptides such as immunoglobulin G glycopeptide and fucosyl-asialo-agalacto-fetuinIt belongs to the family of hydrolases, specifically those glycosidases that hydrolyse O- and S-glycosyl compounds. Wikipedia