Congenital sucrase-isomaltase deficiency is a rare genetic disorder that affects an individual's ability to digest certain sugars. ... down into two glucose molecules. People with congenital sucrase-isomaltase deficiency cannot break down the sugars sucrose ...

... SI gene provides instructions for producing the enzyme sucrase-isomaltase. This enzyme is made in the cells ... molecules to be used by the body. The sucrase-isomaltase enzyme is found on the surface of ...