ID 2.4.1.31 DE laminaribiose phosphorylase. CA beta-D-glucosyl-(1->3)-D-glucose + phosphate = alpha-D-glucose CA 1-phosphate + D-glucose. CC -!- Also acts on 1,3-beta-D-oligoglucans. CC -!- Differs in specificity from EC 2.4.1.30 and EC 2.4.1.97. //