Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

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

from The Century Dictionary.

  • noun An oxidation-ferment which decomposes hydrogen peroxid catalytically with the liberation of oxygen.

from the GNU version of the Collaborative International Dictionary of English.

  • noun an enzyme found in most plant and animal cells that functions as an oxidative catalyst; it decomposes hydrogen peroxide into hydrogen and water.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun An enzyme found in the liver that catalyses the decomposition of hydrogen peroxide to water and oxygen.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun enzyme found in most plant and animal cells that functions as an oxidative catalyst; decomposes hydrogen peroxide into oxygen and water

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[catal(ysis) + –ase.]

Examples

  • 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.

    Emaxhealth

  • 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.

    undefined

  • CP12 acts as a specific chaperone, since it does not protect other proteins, such as catalase, alcohol dehydrogenase, or lysozyme.

    Journal of Biological Chemistry current issue

  • Normally, an enzyme called catalase breaks hydrogen peroxide into water and oxygen, but as the hair follicles aged, that enzyme decreased.

    The old gray hair, she ain’t what she used to be

  • Normally, an enzyme called catalase breaks hydrogen peroxide into water and oxygen, but as the hair follicles aged, that enzyme decreased.

    The old gray hair, she ain’t what she used to be

  • Ovariectomized animals show increased bone resorption, which is prevented by the administration of either estrogen or catalase.

    Forever Young

  • Green Magma also contains the antioxidants alpha-carotene, beta-carotene, vitamin C, vitamin E succinate, superoxide dismutase SOD, catalase, and chlorophyll.

    Forever Young

  • High amounts of malic, citric, tartaric, oxalic and other organic acids combined with the enzymes catalase and peroxidase give honey its renowned antibacterial properties.

    Dr. Reese Halter: Giving Thanks for Bees

  • The barley grass in Green Magma has been shown to contain a high level of antioxidants, including catalase and carotenoids, along with many other nutrients to help the body increase in overall antioxidant status, and therefore may be useful in supporting normal bone mass during menopause and beyond.

    Forever Young

  • Thus, catalase prevents ovariectomy-induced bone loss.

    Forever Young

Comments

Log in or sign up to get involved in the conversation. It's quick and easy.

  • has an iron core to its structure, and iron is essential to its action.

    March 19, 2012