3.2.1.10 alpha-D-glucopyranosyl-(1-4)-[alpha-D-glucopyranosyl-(1-6)]-alpha-D-glucopyranosyl-(1-4)-alpha-D-glucopyranosyl-(1-4)-alpha-D-glucopyranose + H2O = alpha-D-glucopyranosyl-(1-4)-alpha-D-glucopyranosyl-(1-4)-alpha-D-glucopyranosyl-(1-4)-alpha-D-glucopyranose + D-glucose - - 3.2.1.10 alpha-D-glucopyranosyl-(1-4)-[alpha-D-glucopyranosyl-(1-6)]-alpha-D-glucopyranosyl-(1-4)-alpha-D-glucopyranosyl-(1-4)-alpha-D-glucopyranose + H2O = alpha-D-glucopyranosyl-(1-4)-alpha-D-glucopyranosyl-(1-4)-alpha-D-glucopyranosyl-(1-4)-alpha-D-glucopyranose + D-glucose active sites residues are Asp199, Glu255, and Asp329, substrate binding residues are His103, and His328, catalytic mechanism from comparison with other enzymes' primary and crystal enzyme structures 655003 3.2.1.10 alpha-D-glucopyranosyl-(1-4)-[alpha-D-glucopyranosyl-(1-6)]-alpha-D-glucopyranosyl-(1-4)-alpha-D-glucopyranosyl-(1-4)-alpha-D-glucopyranose + H2O = alpha-D-glucopyranosyl-(1-4)-alpha-D-glucopyranosyl-(1-4)-alpha-D-glucopyranosyl-(1-4)-alpha-D-glucopyranose + D-glucose enzyme from intestinal mucosa also catalyzes the reaction of sucrase alpha-glucosidase, EC 3.2.1.48 136506, 136508, 136512, 136513, 136520, 326249, 326253, 326257, 326258, 326263, 326266, 326268 3.2.1.10 alpha-D-glucopyranosyl-(1-4)-[alpha-D-glucopyranosyl-(1-6)]-alpha-D-glucopyranosyl-(1-4)-alpha-D-glucopyranosyl-(1-4)-alpha-D-glucopyranose + H2O = alpha-D-glucopyranosyl-(1-4)-alpha-D-glucopyranosyl-(1-4)-alpha-D-glucopyranosyl-(1-4)-alpha-D-glucopyranose + D-glucose stereochemistry, molecular substrate recognition mechanism, catayltic mechanism 655448