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Page 1 de 61 résultats
Ornithine decarboxylase and arginine decarboxylase gene transcripts are co-localized in developing tissues of Glycine max etiolated seedlings.
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Unlike other eukaryotes, which synthesize polyamines (PA) only from ornithine, plants possess an additional pathway utilizing arginine as a precursor. In this study, we have identified cDNA clones coding for a Glycine max ornithine decarboxylase (ODC, EC 4.1.1.7) and an arginine decarboxylase (ADC,
Use of N-Bromoacetyl-l-ornithine to Study l-Ornithine and l-Arginine Biosynthesis in Soybean (Glycine max L.) Cell Cultures.
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The effect of the inhibitor N(2)-bromoacetyl-l-ornithine (NBAO) on the biosynthesis of ornithine in higher plants, was investigated using soybean cells (Glycine max L. var Mandarin), grown in suspension culture. The NBAO was found to reduce the specific activity of the enzyme
Purification and characterization of arginine decarboxylase from soybean (Glycine max) hypocotyls.
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Arginine decarboxylase (EC 4.1.1.19) was purified from soybean, Glycine max, hypocotyls by a procedure which includes ammonium sulfate fractionation, acetone precipitation, gel filtration chromatography, and affinity chromatography. Using this procedure, ADC was purified to one band in
l-Arginine and l-Canavanine Metabolism in Jack Bean, Canavalia ensiformis (L.) DC. and Soybean, Glycine max (L.) Merr.
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Studies have been conducted with the arginase (l-arginine amidinohydrolase, EC 3.5.3.1) of two legumes: jack bean, Canavalia ensiformis (L.) DC., a l-canavanine-containing plant and soybean, Glycine max, a canavanine-free species. Analyses of the arginase obtained from gradient-purified mitochondria
Molecular cloning and characterization of an arginine decarboxylase gene up-regulated by chilling stress in rice seedlings.
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We cloned a rice cDNA encoding a putative arginine decarboxylase (ADC) protein, a key enzyme involved with putrescine (Put) biosynthesis in plants. The isolated full-length cDNA (OsADC1) contains an insert consisting of 2451 bp. The longest open reading frame within encodes a putative protein of 702
Arginine degradation by arginase in mitochondria of soybean seedling cotyledons.
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Arginase (EC 3.5.3.1) localization was studied in soybean (Glycine max L.) seedling cotyledons. Subcellular fractionation in a discontinuous Percoll gradient showed that arginase was localized in the mitochondrion. Arginine (Arg) uptake by mitochondria was demonstrated by co-sedimentation of
Arginine Metabolism in Developing Soybean Cotyledons: III. Utilization.
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Tracerkinetic experiments were performed using l-[guanidino-(14)C]arginine, l-[U-(14)C]arginine, l-[ureido-(14)C]citrulline, and l-[1-(14)C]ornithine to investigate arginine utilization in developing cotyledons of Glycine max (L.) Merrill. Excised cotyledons were injected with carrier-free (14)C
Polyamine Anabolism in Germinating Glycine max (L.) Seeds : Dynamics of Cadaverine and Putrescine Formation in the Embryonic Axis.
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Active polyamine biosynthesis occurs in the embryonic axis, but not in the cotyledons, during germination of Glycine max (L.) cv Williams seeds and subsequent growth of the young seedlings. The hypocotyl and radicle synthesize and accumulate considerable amounts of cadaverine (Cad) and putrescine
Delineation of the structural and functional role of Arg111 in GSTU4-4 from Glycine max by chemical modification and site-directed mutagenesis.
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The structural and functional role of Arg111 in GSTU4-4 from Glycine max (GmGSTU4-4) was studied by chemical modification followed by site-directed mutagenesis. The arginine-specific reagent 2,3-butanedione (BTD) inactivates the enzyme in borate buffer at pH8.0, with pseudo-first-order saturation
Development of nodules of Glycine max infected with an ineffective strain of Rhizobium japonicum.
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Bacteroids in ineffective (nitrogenase negative) nodules of Glycine max, infected with Rhizobium japonicum 61-A-24, as compared to those in effective nodules are characterized by reduced specific activities of alanine dehydrogenase to 15%, of 3-hydroxybutyrate dehydrogenase to 50%, and an increase
Effect of isoflavone extracts from Glycine max on human endothelial cell damage and on nitric oxide production.
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OBJECTIVE
In this study, we determined the protective effect of isoflavones from Glycine max on human umbilical vein endothelial cell (ECV304) damage induced by hydrogen peroxide (H2O2) and on nitric oxide (NO) production.
METHODS
We studied the regulation of NO synthesis in cultured human
Population-specific gene expression in the plant pathogenic nematode Heterodera glycines exists prior to infection and during the onset of a resistant or susceptible reaction in the roots of the Glycine max genotype Peking.
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BACKGROUND
A single Glycine max (soybean) genotype (Peking) reacts differently to two different populations of Heterodera glycines (soybean cyst nematode) within the first twelve hours of infection during resistant (R) and susceptible (S) reactions. This suggested that H. glycines has
Some aspects of the regulation of arginine biosynthesis in soybean cell cultures.
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The levels of the activities of argininosuccinate synthetase and argininosuccinate lyase were measured in soybean (glycine max L. var. Mandarin) cell suspension cultures grown in the presence or absence of exogenous arginine. In some experiments, actinomycin D or cycloheximide were also added to the
A Pod Leakage Technique for Phloem Translocation Studies in Soybean (Glycine max [L.] Merr.).
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Radioactive photosynthetic assimilates, translocated to a soybean (Glycine max [L.] Merr. ;Fiskeby V') pod can be measured directly by excising the stylar tip of the pod under 20 mm ethylenediaminetetraacetate solution (pH 7.0) and allowing the material to leak into the solution. Pods at the source
Putative occurrence of lysine decarboxylase isoforms in soybean (Glycine max) seedlings.
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The activity of lysine decarboxylase was studied in 3-day-old soybean (Glycine max (L.) Meer cv. Sakai) seedlings also in relation to light conditions. Lysine decarboxylase activity was mainly localized in the roots and to a lesser extent in the hypocotyls and was detectable in both the soluble and
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