Manganese(II)-bicarbonate-mediated catalytic activity for hydrogen peroxide dismutation and amino acid oxidation: detection of free radical intermediates.
نویسندگان
چکیده
منابع مشابه
Manganese(II)-bicarbonate-mediated catalytic activity for hydrogen peroxide dismutation and amino acid oxidation: detection of free radical intermediates.
To examine the structural identities of reactive free radicals and the mechanism of the oxidative modification of proteins, we used EPR and spin-trapping methods to investigate the oxidation of amino acids by H2O2 as well as the decomposition of H2O2 itself catalyzed by Mn(II) ions. Superoxide and hydroxyl radicals (O2-. and OH.) were trapped by a spin trap, 5,5-dimethyl-1-pyrroline-1-oxide (DM...
متن کاملOxidation of Biological Molecules with Bicarbonate-activated Hydrogen Peroxide and the Decompostion of Hydrogen Peroxide Catal
of Thesis Presented to the Graduate School of the University of Florida in Partial Fulfillment of the Requirements for the Degree of Master of Science OXIDATION OF BIOLOGICAL MOLECULES WITH BICARBONATEACTIVATED HYDROGEN PEROXIDE AND THE DECOMPOSITION OF HYDROGEN PEROXIDE CATALYZED BY MANGANESE(II) AND BICARBONATE By Michael S. Mitchell May 2004 Chair: David E. Richardson Major Department: Chemi...
متن کاملCatalytic Role of Multinuclear Palladium-Oxygen Intermediates in Aerobic Oxidation Followed by Hydrogen Peroxide Disproportionation.
Aerobic oxidation of alcohols are catalyzed by the Pd-acetate compound [LPd(OAc)]2(OTf)2 (L = neocuproine = 2,9-dimethyl-1,10-phenanthroline) to form ketones and the release of hydrogen peroxide, but the latter rapidly undergoes disproportionation. We employ a series of kinetic and isotope labeling studies made largely possible by electrospray ionization mass spectrometry to determine the role ...
متن کاملHydrogen Peroxide-mediated Oxidation of Indole-3-acetic Acid by Tomato Peroxidase and Molecular Oxygen.
The oxidation of indole-3-acetic acid by anionic tomato peroxidase was found to be negligible unless reaction mixtures were supplemented with H(2)O(2). The addition of H(2)O(2) to reaction mixtures initiated a period of rapid indole-3-acetic acid oxidation and O(2) uptake; this phase ended and O(2) uptake fell to a low level when the H(2)O(2) was exhausted. The stoichiometry of the reaction, wh...
متن کاملGeneration of Hydrogen Peroxide by Plant Peroxidases Mediated Thiol Oxidation
OBINGER C , BURNER U. & EBERMANN R. 1997. Generation of hydrogen peroxide by plant peroxidases mediated thiol oxidation. Phyton (Horn, Austria) 37 (3): (219) (226). Thiol oxidation by plant peroxidases is an oxygen consuming process independent of hydrogen peroxide addition. The in vitro system consists of two interdependent reactions, i.e. hydrogen peroxide mediated oxidation of thiols via the...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1990
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.87.1.394