Alpha-(1,4) exo-glucosidase involved in breakdown of dietary starch oligosaccharides in small intestine. Cleaves the non-reducing alpha-(1,4)-linked glucose residue in linear dextrins with retention of anomeric center stereochemistry (  ). Mainly hydrolyzes short length oligomaltoses having two to seven glucose residues (  ). Can cleave alpha-(1,2), alpha-(1,3) and alpha-(1,6) glycosidic linkages with lower efficiency, whereas beta glycosidic linkages are usually not hydrolyzed .
Subcellular locations: Apical cell membrane
Brush border.
Broadly expressed. Highly expressed in small intestine. Expressed in granulocytes.