Hydrolysis of terminal (1->4)-linked alpha-D-glucose residues successively from non-reducing ends of the chains with release of beta-D-glucose. Expression is up-regulated in presence of human keratinocytes. May cause an allergic reaction in human. Belongs to the glycosyl hydrolase 15 family. The predicted gene has been split into 2 genes: ARB_02327-1 and ARB_02327-2.