peroxidase

per·ox·i·dase

P0202700 (pə-rŏk′sĭ-dās′, -dāz′)n. Any of a group of enzymes that occur especially in plant cells and catalyze the oxidation of a substance by a peroxide.

peroxidase

(pəˈrɒksɪˌdeɪs; -ˌdeɪz) n (Biochemistry) any of a group of enzymes that catalyse the oxidation of a compound by the decomposition of hydrogen peroxide or an organic peroxide. They generally consist of a protein combined with haem

per•ox•i•dase

(pəˈrɒk sɪˌdeɪs, -ˌdeɪz)

n. any of a class of enzymes that catalyze the oxidation of a compound by the decomposition of peroxide.

Thesaurus

Noun

peroxidase - any of a group of enzymes (occurring especially in plant cells) that catalyze the oxidation of a compound by a peroxideplant life, flora, plant - (botany) a living organism lacking the power of locomotionglutathione peroxidase - an enzyme in the body that is a powerful scavenger of free radicalshorseradish peroxidase - an enzyme used in immunohistochemistry to label antigens and their antibodiesoxidase - any of the enzymes that catalyze biological oxidation

Peroxidase

enUK

peroxidase

[pə′räk·sə‚dās] (biochemistry) An enzyme that catalyzes reactions in which hydrogen peroxide is an electron acceptor.

Peroxidase

any of a group of enzymes of the oxidoreduc-tase class that catalyze the hydrogen-peroxide-mediated or organic-peroxide-mediated oxidation of various polyphenols and aliphatic and aromatic amines, as well as of fatty acids, cytochromes, and glutathione. The peroxidases whose substrates are fatty acids, cytochromes, and glutathione are called fatty-acid peroxidase, cytochrome peroxidase, and glutathione peroxidase, respectively. Depending on the source from which they are isolated, peroxidases vary in molecular weight and substrate specificity. The most widely distributed and well-studied peroxidase is of plant origin, usually obtained from horseradish; its molecular weight is 44,100. The prosthetic group of plant peroxidases resembles heme, which is the prosthetic group of hemoglobin; indeed, hemoglobin does exhibit slight peroxidase activity. Plant peroxidases are important in respiration: together with polyphenol oxidase, they catalyze the oxidative conversion of respiratory chromogens into respiratory pigments.

Small amounts of peroxidase are found in animals, and only in white blood cells and milk. Horseradish peroxidase is used in the laboratory to determine the glucose level of blood and urine and to mark lysosomes in cytochemical studies.

peroxidase

[pĕ-rok´sĭ-dās] any of a group of iron-porphyrin enzymes that catalyze the oxidation of some organic substrates in the presence of hydrogen peroxide.

pe·rox·i·dase

(pĕ-rok'si-dās), Hydrogen peroxide-reducing oxidoreductase; type of enzymes in animal and plant tissues that catalyzes the dehydrogenation (oxidation) of various substances in the presence of hydrogen peroxide, which acts as hydrogen acceptor, being converted to water in the process.

peroxidase

(pə-rŏk′sĭ-dās′, -dāz′)n. Any of a group of enzymes that occur especially in plant cells and catalyze the oxidation of a substance by a peroxide.

peroxidase

an enzyme that catalyses the oxidation of various substances by peroxides.

peroxidase

Related to peroxidase: horseradish peroxidase, peroxidase reaction, Thyroid peroxidase

noun

Words related to peroxidase

noun any of a group of enzymes (occurring especially in plant cells) that catalyze the oxidation of a compound by a peroxide

Related Words

plant life
flora
plant
glutathione peroxidase
horseradish peroxidase
oxidase