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 (kăt′l-ās′, -āz′)
An enzyme found in living cells that catalyzes the decomposition of hydrogen peroxide, a potentially harmful oxidizing agent, into water and oxygen.

cat′a·lat′ic (kăt′l-ăt′ĭk) adj.


(Biochemistry) an enzyme that catalyses the decomposition of hydrogen peroxide


(ˈkæt lˌeɪs, -ˌeɪz)

an enzyme that decomposes hydrogen peroxide into oxygen and water.
[1900–05; catal (ysis) + -ase]
cat`a•lat′ic (-ˈæt ɪk) adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.catalase - enzyme found in most plant and animal cells that functions as an oxidative catalyst; decomposes hydrogen peroxide into oxygen and water
enzyme - any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions
References in periodicals archive ?
The catalase activity of the isolate was determined using its crude enzyme extract which was maximum at pH 10 .
KEYWORDS: Antioxidant enzyme, Catalase, Polymorphism, Promoter, Reactive oxygen species.
The catalase activity and glutathione reductase levels were measured in erythrocytes.
Enzymatic antioxidant defense includes superoxide dismutase (SOD), glutathione peroxidase (GPx), catalase (CAT).
Table (3) showed that catalase activity showed a significant decrease in patients group when compared to control group p<0.
In the evaluation of catalase and ascorbate peroxidase enzymatic activities (Table 1 and Figures 2 and 3 (A and B)), the variety RB867515 promoted higher values compared with RB92579 and RB962962, indicating its greater capacity of adaptation to salt stress.
PTZ-induced kindling in the mice showed an increase in the level of lipid peroxidation and a decrease in the levels of SOD, catalase, GSH, and GABA.
To measure CAT activity, a Catalase Assay Kit (Item number 707002), manufactured by Cayman Chemical Company, Ann Arbor, MI (BIOKOM, Ulica Wspolna 3, 05-090 Janki, Poland), was used.
But there is a silver lining: Latest scientific research studied catalase even further and found a treatment that not only helps vitiligo patients but also reverses graying hair.
Editor's Note: In another experiment, mice that were genetically modified to over-express mitochondrially targeted catalase had thymus glands that were significantly protected from thymus atrophy at six months of age compared to those of normal control animals.