Cu/Zn superoxide dismutase in excretory-secretory products of the human hookworm Necator americanus . An electron paramagnetic spectrometry study
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چکیده
منابع مشابه
activity of superoxide dismutase (sod) enzyme in the excretory-secretory products of fasciola hepatica and f. gigantica parasites.
background: the aim of this study was to compare superoxide dismutase (sod) activity in fasciola hepatica and fasciola gigantica parasites. materials: f. gigantica and f. hepatica helminths were collected from abattoir and cultured in buffer media for 4 h at 37 °c. excretory-secretory (es) products were collected, centrifuged and stored at - 20 ◦ c. e-s protein concentration was measured by bra...
متن کاملProteolytic degradation of hemoglobin in the intestine of the human hookworm Necator americanus.
Blood-feeding parasites use mechanistically distinct proteases to digest hemoglobin (Hb), often as multienzyme cooperative cascades. We investigated the roles played by 3 distinct proteases from adults of the human hookworm Necator americanus. The aspartic protease Na-APR-1 and the cysteine protease Na-CP-3 were expressed in catalytically active form in yeast, and the metalloprotease Na-MEP-1 w...
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_, We have used female and male transgenic (Tg) mice that carry the complete sequence of the human copper-zinc (CuZn) , superoxide dismutase (SOD) gene in order to assess the lethal effects of methylenedioxyamphetamine (MDA) and methylene,_ im dioxymethamphetamine (MDMA). In contrast to non-Tg mice, both heterozygous and homozygous SOD-Tg mice showed resistance to the lethal effects of both dru...
متن کاملActivity of Superoxide Dismutase (SOD) Enzyme in the Excretory-Secretory Products of Fasciola hepatica and F. gigantica Parasites
BACKGROUND The aim of this study was to compare superoxide dismutase (SOD) activity in Fasciola hepatica and Fasciola gigantica parasites. MATERIALS F. gigantica and F. hepatica helminths were collected from abattoir and cultured in buffer media for 4 h at 37 °C. Excretory-Secretory (ES) products were collected, centrifuged and stored at -20(°)C. E-S protein concentration was measured by Brad...
متن کاملElectron paramagnetic resonance studies of cobalt-copper bovine superoxide dismutase.
1. EPR spectra of cobalt-copper bovine superoxide dismutase at liquid nitrogen and liquid helium temperature show that the two metal centers are magnetically coupled. The temperature dependence of the spectra indicates that this coupling arises from an exchange interaction. 2. The EPR spectrum of the Co(I1) of the enzyme can only be seen after reduction of the Cu(II), at very low temperature. I...
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ژورنال
عنوان ژورنال: European Journal of Biochemistry
سال: 1999
ISSN: 0014-2956,1432-1033
DOI: 10.1046/j.1432-1327.1999.00626.x