label: [(1->3)-alpha-D-glucosyl](n) + phosphate <=> [(1->3)-alpha-D-glucosyl](n-1) + beta-D-glucose 1-phosphate
label_lc: [(1->3)-alpha-d-glucosyl](n) + phosphate <=> [(1->3)-alpha-d-glucosyl](n-1) + beta-d-glucose 1-phosphate