alpha-D-glucose 1-phosphate + D-glucose => beta-D-glucosyl-(1->3)-D-glucose + phosphate
alpha-d-glucose 1-phosphate + d-glucose => beta-d-glucosyl-(1->3)-d-glucose + phosphate
alpha-D-glucose 1-phosphate + D-glucose => beta-D-glucosyl-(1->3)-D-glucose + phosphate
alpha-d-glucose 1-phosphate + d-glucose => beta-d-glucosyl-(1->3)-d-glucose + phosphate