2.4.1.279 3-O-alpha-D-glucopyranosyl-D-glucopyranose + phosphate = D-glucose + beta-D-glucose 1-phosphate - - 2.4.1.279 3-O-alpha-D-glucopyranosyl-D-glucopyranose + phosphate = D-glucose + beta-D-glucose 1-phosphate sequential bi-bi mechanism -, 721375