Disaccharidases are glycoside hydrolases, enzymes that break down certain types of sugars called disaccharides into simpler sugars called monosaccharides. A genetic defect in one of these enzymes will cause a disaccharide intolerance, such as lactose intolerance or sucrose intolerance. ==Examples of disaccharidases== For a thorough scientific over... Found on http://en.wikipedia.org/wiki/Disaccharidase