Pectinase is a general term for enzymes that break down pectin, a polysaccharide found in plant cell walls. These enzymes are commonly used to speed the extraction of fruit juice from fruits like apples. Pectinase can be extracted from fungi such as Aspergillus niger. Commercially, pectinase is added to livestock feed to help digest nutrients and is also used in wine production and fruit juice extraction to improve clarity and yield.