By C.C. Reddy (Eds.)
The second one of 2 volumes proposing present learn into oxidation platforms, this e-book is meant for biochemists, toxicologists, and pharmacologists. themes mentioned contain oxidation mechanisms in carcinogenesis, lipid peroxidation and different non-enzymatic reactions of oxygen
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Additional info for Biological Oxidation Systems. Volume 2
3 ppm are the ortho, meta and para, and methyl protons of MPSO, respectively. These assignments gave the expected 2:3:3 ratios, and were further confirmed by studies at varying Eu(hfc)3 levels. All other peaks originated from the europium complex and are not important. 126 ppm splitting of the methyl resonances was due to non-equal complex formation of the two MPSO diastereomers, with the complex of the S-MPSO enantiomer at higher field. In agreement with the polarimetry data, the average ratio of enantiomers in the NMR was 44:56, not a very large difference.
W. Egan 6. K. A. (1966) Reel. Trav. Chim. Pays-Bas 85,405 7. E. B. (1982) Mol. Pharmacol. 21,133 8. M. A. Jr. (1980) /. Biol Chem. 255,323 9. Tatum, CM. , Schleicher, E. G. (1977) Biochemistry 16,1093 10. H. Jr. H. (1962) J. Org. Chem. 27,1468 11. , Newman, N. M. (1962) J. Org. Chem. 27,2707 12. R. A. W. ) Vol. 6, pp. 149-151. Raven Press, New York Molecular Mechanisms for the Peroxidase Catalyzed Activation of Arylamine Carcinogens to Cytotoxic Metabolites PJ. O'Brien, S. Khan, S. G. McGirr Faculty of Pharmacy, University of Toronto 19 Rüssel Street, Toronto, Ontario M5S 2S2 Canada Abstract 1.
Methionine prevented the cytotoxicity indicating that the latter oxidation was probably mediated by the hypobromite formed by the lactoperoxidase. p-Phenetidine was also cytotoxic in the presence of nontoxic concentrations of hypochlorite and a spectral analysis of the reaction mixture revealed the formation of benzoquinoneimine and N-chloroquinonemine. Because oxidation by hypochlorite involved O-deethylation of the p-phenetidine, the oxidation of p-aminophenol by hypochlorite was also investigated.