Hydrolysis brush border surface

4-a-D-glucosidase, also called glucoamylase or maltase, catalyzes sequential hydrolysis of terminal glucosyl units linked in a(l 4) linkages from the nonreducing ends of malto-oligosaccharides or maltose. 

a-Trehalose glucohydrolase, also called Tre/jatoc, catalyzes the hydrolysis of trehalose into two glucose units. 

---

Brush-border surface hydrolysis of oligosaccharides and disaccharides (e.g., sucrose, lactose, and trehalose) to their monomers by specific oligosaccharidases that are integral to the cell membrane of the enterocyte and... 

Final hydrolysis of di- and oligosaccharides is carried out by surface enzymes of the small intestinal epithelial cells, called the brush border, a term that comes from the appearance of the enterocytes, in which the luminal plasma membrane is enlarged by a regular array of projections called microvilli. The enzymes are not secreted into the lumen, but are embedded in the cell membrane, many of these enzymes can protrude into the intestinal lumen up to 10 gm, as they are attached to the plasma membrane by an anchoring polypeptide that has no role by itself in the hydrolysis. 

---