Results 311 to 320 of about 679,415 (356)

NADH-Ferric Reductase Activity Associated with Dihydropteridine Reductase

Biochemical and Biophysical Research Communications, 2000
In mammals dietary ferric iron is reduced to ferrous iron for more efficient absorption by the intestine. Analysis of a pig duodenal membrane fraction revealed two NADH-dependent ferric reductase activities, one associated with a b-type cytochrome and the other not.
P L, Lee, C, Halloran, A R, Cross, E, Beutler   +3 more
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Functional domains of assimilatory nitrate reductases and nitrite reductases

Trends in Biochemical Sciences, 1990
Biochemical investigation of nitrate assimilation enzymes spans the past four decades. With the molecular cloning of genes for nitrate reductases and nitrite reductases, exciting new prospects are developing for the study of these enzymes. As large, complex enzymes with multiple redox centers, these two types of reductases should help us gain ...
W H, Campbell, K R, Kinghorn
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Glutathione reductase in evolution

Journal of Molecular Evolution, 1983
The disulfide reducing activities of GSSG-and CoASSG-reductases were measured on partially purified extracts from a variety of prokaryotes and eukaryotes. Glutathione-reductase was found in varying amounts in all eukaryotes and prokaryotes, used in this study, with the exception of the two strict anaerobes Clostridium tartarivorum and Desulfovibrio ...
R N, Ondarza, J L, Rendón, M, Ondarza
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Human Carbonyl Reductases

Current Drug Metabolism, 2010
Enzymatic carbonyl reduction means the formation of a hydroxy function out of a ketone or aldehyde moiety and applies for the metabolism of physiological (endogenous) or xenobiotic (exogenous) molecules. As for endogenous substrates, carbonyl reduction is often part of a reversible oxidoreductase process and involves the activation or inactivation of ...
Petra, Malátková, Edmund, Maser, Vladimír, Wsól   +2 more
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The Aldose Reductase Controversy

Diabetes, 1994
ext to the debate as to whether chronic hyperglycemia is the primary cause of the late vascular complications of diabetes, the longest running controversy among researchers and clinicians studying this disease is the role of the sorbitol pathway, particularly its initial enzymatic step, the reduction of glucose to sorbitol by aldose reductase in the ...
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Sepiapterin reductase

Biochimica et Biophysica Acta (BBA) - Enzymology and Biological Oxidation, 1966
M, Matsubara, S, Katoh, M, Akino, S, Kaufman   +3 more
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Dihydromorphinone ketone reductases

Life Sciences, 1975
Abstract Dihydromorphinone ketone reductases are new NADPH dependent drug metabolizing enzymes which occur predominantly in cytosol of liver and to a lesser extent in kidney and lung. The hepatic enzyme of the chicken has been found to differ from that of rabbit with respect to relative effectiveness of inhibitors and according to certain other ...
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Pterine reductase

Biochimica et Biophysica Acta, 1958
B E, WRIGHT, M L, ANDERSON
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The hydroxylamine reductase of mitochondria

Archives of Biochemistry and Biophysics, 1969
Abstract The hydroxylamine reductase of rat liver mitochondria has been studied. This enzyme reduces hydroxylamine (HA) to ammonia, using NADH; the stoichiometry of the reaction is 1:1:1. Although extensive efforts have been made to solubilize the enzyme, it remains firmly attached to the mitochondrial membrane.
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Nitrite Reductases in Denitrification

2007
Nitrite reductase (NIR) is a key enzyme in the dissimilatory denitrification chain, catalyzing the reduction of NO2 - to NO. Although a matter of debate for a long time, NO is now accepted product of NO2 --reduction as an obligatory intermediate in most denitrifiers, and it is further reduced to N2O by NO reductase. Purification and characterization of
RINALDO, Serena, CUTRUZZOLA', Francesca
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