• Haem peroxidases (or heme peroxidases) are haem-containing enzymes that use hydrogen peroxide as the electron acceptor to catalyse a number of oxidative reactions. (wikipedia.org)
  • Although the activities of most antioxidant and sulfur metabolism-related enzymes and glyoxalase I and the level of reduced glutathione in the Mg-deficient leaves and roots and the level of ascorbate in the leaves were kept in higher levels, the levels of malonaldehyde and MG and/or electrolyte leakage were increased in the Mg-deficient lower and upper leaves and roots, especially in the Mg-deficient lower leaves and roots. (biomedcentral.com)
  • Most of parameters involved in ROS and MG metabolisms had similar variation trends and degrees between the Mg-deficient lower leaves and roots, but several parameters (namely glutathione S-transferase, sulfite reductase, ascorbate and dehydroascorbate) displayed the opposite variation trends. (biomedcentral.com)
  • 2004. Abiotic stress alters transcript profiles and activity of glutathione S- transferase, glutathione peroxidase, and glutathione reductase in Euphorbiaesula. (innspub.net)
  • A simple and sensitive colorimetric assay for serum diamine oxidase (DAO) activity was based on a coupled reaction with peroxidase and a new chromogen, 10-(carboxymethyl-aminocarbonyl)-3,7-bis(dimethylamino) phenothiazine sodium salt (DA-67). (fujita-hu.ac.jp)
  • The proposed method eliminates the interferences occurring in serum with use of ascorbate oxidase and stops the reaction with sodium diethyldithiocarbamate, leaving the methylene blue in the reaction mixture stable for about 2 h. (fujita-hu.ac.jp)
  • In the presence of peroxide and DA-67, peroxidase catalyzes the formation of methylene blue having an absorption maximum at 668 nm. (fujita-hu.ac.jp)
  • One oxidizing equivalent resides on iron, giving the oxyferryl intermediate, and in many peroxidases the porphyrin (R) is oxidized to the porphyrin pi-cation radical (R'). Compound I then oxidizes an organic substrate to give a substrate radical and Compound II, which can then oxidize a second substrate molecule. (wikipedia.org)
  • In water solutions, this substance is present as a monovalent anion, ascorbate- (Asc-), which easily donates electrons to oxidized molecules and scavenges reactive oxygen species (ROS). (deepdyve.com)
  • 1994. Oxygen and environmental stress in plants: an evolutionary context. (innspub.net)
  • Haem peroxidases include two superfamilies: one found in bacteria, fungi, and plants, and the second found in animals. (wikipedia.org)
  • Among the defense mechanisms that activate plants to cope with environmental stress situations, it is worth noting the ascorbate-glutathione cycle, a complex metabolic pathway in which a variety of photochemical, chemical and enzymatic steps are involved. (biomedcentral.com)
  • The obtained results are broadly consistent with experimental observations and highlight the key role played by ascorbate recycling for plants to adapt to their surrounding environment. (biomedcentral.com)
  • In addition, plants can also dissipate excess excitation energy in PSII antenna as heat through nonphotochemical processes, which involves the xanthophyll cycle using ascorbate (ASC) as the reducing agent [ 4 ]. (biomedcentral.com)
  • In the two tomato cultivars, the activities of ascorbate peroxidase (APX) and peroxidase (POD) in the SA + TYLCV treated plants were increased during the experiment period except at 14 days (APX in 'Jinpeng-1' was also at 4 days) post infected (dpi) with TYLCV. (biomedcentral.com)
  • Modulation of growth, ascorbate-glutathione cycle and thiol metabolism in rice (Oryza sativa L. cv. (caluniv.ac.in)
  • Enhanced peroxidase activity associated with the hypersensitive response of Solanum dulcamara to the ball mite Aceria cladophthirus (Acari: Eriophyoidea). (indianentomology.org)
  • 2,3,7,8-Tetrachlorodibenzo- p -dioxin as an antiestrogen: Effect on rat uterine peroxidase activity. (cdc.gov)
  • The effect of selenium and vitamin E on glutathione peroxidase levels and subjective symptoms in patients with arthrosis and rheumatoid arthritis, in Proc N Z Workshop on Trace Elements in N Z. Dunedin, U. of Otago, 92, 1981. (vitalraadet.dk)
  • Ascorbate peroxidase has vital defensive role against ROS [ 17 ] and can catalyze the breakdown of H 2 O 2 that is produced by SOD. (hindawi.com)
  • This graph shows the total number of publications written about "Glutathione Peroxidase" by people in this website by year, and whether "Glutathione Peroxidase" was a major or minor topic of these publications. (umassmed.edu)
  • Exogenous ascorbate also induces a moderate increase in programmed cell death symptoms in intact roots, but it does not activate Ca2+ influx currents in patch-clamped root protoplasts. (deepdyve.com)
  • Intriguingly, the replacement of gluconate with ascorbate in the patch-clamp pipette reveals a large ascorbate efflux current, which shows sensitivity to the anion channel blocker, anthracene-9-carboxylic acid (A9C), indicative of the ascorbate release via anion channels. (deepdyve.com)
  • Nickel depletes intracellular ascorbate, which leads to the inhibition of cellular hydroxylases, manifested by the loss of hypoxia-inducible factor (HIF)-1α and - 2α hydroxylation and hypoxia-like stress. (nih.gov)
  • 12. One-electron reduction of vanadate by ascorbate and related free radical generation at physiological pH. (nih.gov)
  • 16. Iron-induced ascorbate oxidation in plasma as monitored by ascorbate free radical formation. (nih.gov)
  • One of the most efficient free-radical quenchers is ascorbate, which most animals manufacture endogenously. (majesticaestheticswellness.com)
  • Recent findings indicate the first molecular line of defense against free-radical lipid peroxidation damage in the body involves water-soluble vitamin L-ascorbate (i.e., in salt form at physiological pH values). (majesticaestheticswellness.com)
  • Scorbutic type bone changes seen in infants fed exclusively with copper-poor cow's milk are believed due to decreased activity of ascorbate oxidase, a cuproenzyme. (nih.gov)
  • Manganese peroxidase (MnP) is an extracellular heme enzyme produced by the lignin-degrading white-rot fungus Phanerochaete chrysosporium. (nih.gov)
  • In addition, this is the first structure of a heme peroxidase from a eukaryotic organism at sub-Angstrom resolution. (nih.gov)
  • The first of three hypotheses presented here proposes that a genetic defect, caused by either free radicals or a virus, deleted the gene needed by Anthropoidea to manufacture endogenous ascorbate. (majesticaestheticswellness.com)
  • Salt stress induced the oxidative stress, the content of malonaldehyde significantly increased, the activity of ascorbate peroxidase, peroxidase, the content of total phenols and part phenolic compounds increased with the increasing concentration of NaCl. (nefu.edu.cn)
  • SELENIUM is part of glutathione peroxidase which protects cell components from oxidative damage due to peroxides produced in cellular metabolism. (nih.gov)
  • Peroxidase activities in root segments of wheat genotypes under osmotic stress. (ac.ir)
  • Furthermore, cowpea nodules co-inoculated with Bradyrhizobium and plant growth-promoting bacteria and exposed to salt stress displayed significant alterations in the total, reduced and oxidized forms of ascorbate and glutathione. (scielo.br)
  • 1994. Ah receptor in embryonic mouse palate and effects of TCDD on receptor expression. (cdc.gov)