A Tokyo University of Science study identifies a novel β-galactosidase in Bacteroides xylanisolvens that breaks down ...

Lactose is a form of sugar, or carbohydrate, found in milk and dairy products. This sugar is too large to be absorbed by the intestine, and is broken down by an enzyme, lactase, produced by the body.

Another, less severe, example is lactose intolerance. Many people can digest milk just fine when they are infants or children. But after childhood, many people begin to lose a key enzyme that helps ...