The atypical two-electron oxidation of thioanisole and its p-methyl, p-methoxy, and p-nitro analogues by horseradish peroxidase, contrary to earlier reports, stereoselectively produces the (8) sulfoxides in 6070% enantiomeric excess. Horseradish peroxidase reconstituted with 6-meso-ethylheme has little peroxidase (guaiacol oxidizing) activity, as previously reported, but exhibits increased sulf...

The glutathione peroxidase-glutathione reductase system, an alternative pathway for metabolic utilization of H2O2 [Chance, Sies & Boveris (1979) Physiol. Rev. 59, 527-605], was investigated in Trypanosoma cruzi, an organism lacking catalase and deficient in peroxidase [Boveris & Stoppani (1977) Experientia 33, 1306-1308]. The presence of glutathione (4.9 +/- 0.7 nmol of reduced glutathione/10(8...

Aristolochic acid I (AAI) and aristolochic acid II (AAII), the two major components of the carcinogenic plant extract aristolochic acid (AA), are known to be mutagenic and to form DNA adducts in vivo. According to the structures of the major DNA adducts identified in animals and humans, nitroreduction is the crucial pathway in the metabolic activation of these naturally occurring nitroarenes to...

Academic dissertation To be presented for public criticism, with permission of the Abbreviations ABA abscisic acid HRGP hydroxyproline-rich glycopro-tein AOX alternative oxidase JA jasmonic acid APX ascorbate peroxidase MJ methyl jasmonate ARE antioxidant responsive element MPT1 mitochondrial phosphate translocator1 CAT catalase MRE metal responsive element Cat1AS CAT1 antisense mRNA messenger ...

We have assigned the biosynthetic processing steps of cathepsin D to intracellular compartments which are involved in its transport to lysosomes in HepG2 cells. Cathepsin D was synthesized as a 51-kDa proenzyme. After formation of 51-55-kDa intermediates due to processing of N-linked oligosaccharides, procathepsin D was proteolytically processed to an intermediate 44-kDa and the mature 31-kDa e...

background: in fertile women, glycodelin and glutathione peroxidase 3 (gpx3) genes expression rises during the luteal phase, with a peak occurring during the implantation window. the expression of these genes decreases in women with myomas. to determine whether myomectomy would reverse glycodelin and gpx3 expression, we evaluated the transcript levels of these genes in the endometrium of patien...

fifteen yarrow populations from different species achillea millefolium l., a. biebersteinii l. and a. nobilis, from different geographical areas of iran were studied using 24 morphological traits and peroxidase profiles. comparison of mean values of different phenotypic traits show a. millefolium and a. biebersteinii l. had higher plant height and crown diameter; however, a. nobilis had higher ...

With the use of the cytochemical stain for horseradish peroxidase of Graham and Karnovsky (1966. J. Histochem. Cytochem.14:291), conjugates of horseradish peroxidase with ricin, wheat germ agglutinin, and phytohemagglutinin were employed for the morphologic demonstration of d-galactose (ricin), N-acetylglucosamine (wheat germ), and N-acetylgalactosamine (phytohemagglutinin) containing moieties ...