Definition of "catalase" []

• An enzyme found in the blood and in most living cells that catalyzes the decomposition of hydrogen peroxide into water and oxygen. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "One reason for their discontent may be found in the results of another recent study, which named an enzyme called catalase as a primary culprit for causing graying hair."
• "Initially, hydrogen peroxide is produced in trace amounts because another enzyme called catalase (an enzyme that helps to break down hydrogen peroxide into harmless water and oxygen) is present."
• "CP12 acts as a specific chaperone, since it does not protect other proteins, such as catalase, alcohol dehydrogenase, or lysozyme."