dases (Figure 7.10) . For example, isomaltase cleaves the α(1→6) bond in isomaltose and maltase cleaves maltose and maltotriose, each producing glucose, sucrase cleaves sucrose producing glu- cose and fructose, and lactase ( β-galactosidase ) cleaves lactose producing galactose and glucose. Trehalose, an α(1→1) disaccha- ride of glucose found in mushrooms and other fungi, is cleaved by trehalase . These enzymes are secreted through, and remain asso- ciated with, the luminal side of the brush border membranes of the intestinal mucosal cells.