lipase

lipase

lipase (līˈpās), any enzyme capable of degrading lipid molecules. The bulk of dietary lipids are a class called triacylglycerols and are attacked by lipases to yield simple fatty acids and glycerol, molecules which can permeate the membranes of the stomach and small intestine for use by the body. Gastric lipase, secreted by the stomach lining, has a pH value for optimal activity around neutrality and would appear, therefore, to be essentially inactive in the strongly acid environment of the stomach. It is suggested that this enzyme is more important for infant digestion since the gastric pH in infancy is much less acid than later in life. Most lipid digestion in the adult occurs in the upper loop of the small intestine and is accomplished by a lipase secreted by the pancreas. Phospholipases are the enzymes that degrade phospholipids.

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lipase

[′lī‚pās]

(biochemistry)

An enzyme that catalyzes the hydrolysis of fats or the breakdown of lipoproteins.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

lipase

any of a group of fat-digesting enzymes produced in the stomach, pancreas, and liver and also occurring widely in the seeds of plants

Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005