Skip to main content
Glite Dictionary
peroxidase

peroxidase

1 7.9
An enzyme in plants that uses hydrogen peroxide to change other chemicals
  • noun
  • /pəˈrɒksɪdeɪs/
  • Specialized
translation icon : peroxidasa
  • "Cutting a cantaloupe under UV light," says Lamikanra, "causes a hypersensitive defense response to take place within its tissues." As part of this response, the plant produces certain peroxidase enzymes, which Lamikanra says function as protective antioxidants.
  • horseradish peroxidase
  • glutathione peroxidase
  • peroxidase-conjugated antibodies

Examples

  • The mechanism of antioxidants includes the activation of defense enzymes such as glutathione peroxidase, superoxide dismutase, and catalase, which are responsible for ROS scavenging.

    Academic text (2008)

  • Glutathione peroxidase and superoxide dismutase activities were increased to varying degrees, and malondialdehyde (MDA) levels were reduced (Cao et al., 2008).

    Academic text (2015)

  • So we have a glutathione peroxidase, which was also in the current paper.

  • We removed endogenous peroxidase by dipping the sections in 3% hydrogen peroxide for 10 minutes.

    Academic text (2008)

  • Yes, that's thyroid peroxidase antibodies, TPO.

  • But the glutathione peroxidases actually take two molecules of glutathione plus hydrogen peroxide.

  • The compound, Dincher explains, turns up levels of proteins such as chitinases, glucanases, and peroxidases.

    Academic text (1996)

  • Afterwards, 2 drops of horseradish peroxidase (HRP) polymer conjugate were applied and incubated for 10 minutes.

    Academic text (2015)

  • The sections were then rinsed in PBS, immersed in a quenching solution to inhibit endogenous peroxidase, and rinsed again in PBS.

    Academic text (2005)

  • Glutathione peroxidase helps protect cells from oxidative damage by breaking down hydrogen peroxide.

Compounds

glutathione peroxidase
  • Specialized
7.4

A body protein that protects cells by breaking down harmful peroxides

horseradish peroxidase
  • Specialized
7.1

An enzyme from horseradish used to show antibodies in lab tests

Surface Forms

peroxidase singular
peroxidases plural

Morphology

peroxidase = peroxide (transparent) = peroxide + ase

Clearly formed from the chemical noun 'peroxide' plus the enzyme suffix '-ase', meaning an enzyme that acts on peroxides.

Etymology

The word peroxidase comes from peroxide, a chemical with extra 'oxygen' like the common 'hydrogen peroxide', and the enzyme ending -ase, the same ending in lactase. So a peroxidase is an enzyme that uses peroxide to change other substances by using that extra 'oxygen'.