<unk>  is an enzyme produced by many organisms. It is located in the brush border of the small intestine of humans and other mammals.<unk>  is essential to the complete digestion of whole milk; it breaks down<unk> , a sugar which gives milk its sweetness. Lacking<unk> , a person consuming dairy products may experience the symptoms of<unk>  intolerance.<unk>  can be purchased as a food supplement, and is added to milk to produce "lactose-free" milk products.<unk>  (also known as<unk> -phlorizin hydrolase, or LPH), a part of the β-galactosidase family of enzymes, is a glycoside hydrolase involved in the hydrolysis of the disaccharide<unk>  into constituent galactose and glucose monomers.<unk>  is present predominantly along the brush border membrane of the differentiated enterocytes lining the villi of the small intestine. In humans,<unk>  is encoded by the<unk>  gene on chromosome 2.
Lactase
Alpha-amylase
Amidase
Wobenzym
Fibrinolysin
Proteases 
Pancreatic elastase
Iduronidase