2.4.1.230	2-alpha-D-glucosyl-D-glucose + phosphate = D-glucose + beta-D-glucose 1-phosphate	the enzyme from Thermoanaerobacter brockii can act with alpha-1,2-oligoglucans, such as selaginose, as substrate, but more slowly. The enzyme is inactive when dissaccharides with linkages other than alpha-1,2 linkages, such as sophorose, trehalose, neotrehalose, nigerose, laminaribiose, maltose, cellobiose, isomaltose, gentiobiose, sucrose and lactose, are used as substrates	-