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Página 1 a partir de 73 resultados
Molecular docking of Glycine max and Medicago truncatula ureases with urea; bioinformatics approaches.
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Urease (EC 3.5.1.5) is a nickel-dependent metalloenzyme catalyzing the hydrolysis of urea into ammonia and carbon dioxide. It is present in many bacteria, fungi, yeasts and plants. Most species, with few exceptions, use nickel metalloenzyme urease to hydrolyze urea, which is one of the commonly used
Soybean (Glycine max) urease: significance of sulfhydryl groups in urea catalysis.
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The soybean urease (urea amidohydrolase; EC 3.5.1.5) was investigated to elucidate the presence of sulfhydryl (-SH) groups and their significance in urea catalysis with the help of various -SH group specific reagents. The native urease incubated with 5,5'-dithiobis (2-nitrobenzoic acid) (DTNB)
The impact of lower gut nitrogen supply on nitrogen balance and urea kinetics in growing pigs fed a valine-limiting diet.
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An N-balance and isotope dilution study was performed to determine the effect of lower gut N supply on N retention and CO(NH(2))(2) kinetics in growing pigs. Nine cecally cannulated and jugular-catheterized barrows (initial BW 22.4 ± 1.2 kg) were randomly assigned to 1 of 3 cecal N infusion
Soyuretox, an Intrinsically Disordered Polypeptide Derived from Soybean (Glycine Max) Ubiquitous Urease with Potential Use as a Biopesticide.
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Ureases from different biological sources display non-ureolytic properties that contribute to plant defense, in addition to their classical enzymatic urea hydrolysis. Antifungal and entomotoxic effects were demonstrated for Jaburetox, an intrinsically disordered polypeptide derived from jack bean
Nitrogen metabolism in soybean tissue culture: I. Assimilation of urea.
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Cultured soybean (Glycine max, Kanrich variety) cells grow with 25 mm urea as the sole nitrogen source but at a slower rate than with the Murashige and Skoog (MS) (Physiol. Plant. 15: 473-497, 1962) nitrogen source of 18.8 mm KNO(3) and 20.6 mm NH(4)NO(3). Growth with urea is restricted by 18.8 mm
Biochemical and structural studies on native and recombinant Glycine max UreG: a detailed characterization of a plant urease accessory protein.
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Urea is the nitrogen fertilizer most utilized in crop production worldwide. Understanding all factors involved in urea metabolism in plants is an essential step towards assessing and possibly improving the use of urea by plants. Urease, the enzyme responsible for urea hydrolysis, and its accessory
Ion balance, uptake, and transport processes in n(2)-fixing and nitrate- and urea-dependent soybean plants.
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The objective of this study was to examine the influence of N(2) fixation and NO(3) (-)-N and urea-N assimilation on ion balance, uptake, and transport processes in soybean (Glycine max L. Merr.).Inoculated plants were grown in Perlite supplied daily with nutrient solutions which contained zero-N,
Nitrogen Metabolism in Soybean Tissue Culture: II. Urea Utilization and Urease Synthesis Require Ni.
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Potassium citrate (10 mM, pH 6) inhibits the growth of cultured (Glycine max L.) cells when urea is the sole nitrogen source. Ureadependent citrate toxicity is overcome by three separate additions to the growth medium: (a) NH(4)Cl (20 mM); (b) high levels of MgCl(2) (10 mM) or CaCl(2) (5-10 mM); (c)
Soybean cultivars 'Williams 82' and 'Maple Arrow' produce both urea and ammonia during ureide degradation.
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The ability of two soybean (Glycine max L. [Merrill]) cultivars, 'Williams 82' and 'Maple Arrow', which were reported to use different ureide degradation pathways, to degrade the ureides allantoin and allantoate was investigated. Protein fractions and total leaf homogenates from the fourth
Isolation and Initial Characterization of Constitutive Nitrate Reductase-Deficient Mutants NR328 and NR345 of Soybean (Glycine max).
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Two nitrate reductase deficient mutants of soybean (Glycine max [L.] Merr. cv Bragg) were isolated from approximately 10,000 M(2) seedlings, using a direct enzymic assay in microtiter plates. Stable inheritance of NR345 and NR328 phenotypes has been demonstrated through to the M(5) generation. Both
Effect of mycorrhizae, Thiobacillus and sulfur nutrition on the chemical composition of soybean [Glycine max (L.)] Merr. seed.
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A field experiment carried out in a calcareous soil with a low available phosphorus to evaluate effectiveness of biofertilizers, mycorrhizae (Glomus intraradices) and Thiobacillus sp. inoculation individually or in combination on seed yield, oil, protein and some elements (P, Fe, Mn, Zn)
Evaluation of the Protective Role of Glycine max Seed Extract (Soybean Oil) in Drug-Induced Nephrotoxicity in Experimental Rats.
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This study was conducted to evaluate the nephroprotective effect of Glycine max seed extract (soybean oil) against gentamicin- and rifampicin-induced nephrotoxicity in Sprague-Dawley rats and to compare its effects with those of vitamin E, which has well-established antioxidant and nephroprotective
Nitrate Reductases from Wild-Type and nr(1)-Mutant Soybean (Glycine max [L.] Merr.) Leaves : I. Purification, Kinetics, and Physical Properties.
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NADH:nitrate reductase (EC 1.6.6.1) and NAD(P)H:nitrate reductase (EC 1.6.6.2) were purified from wild-type soybean (Glycine max [L.] Merr., cv Williams) and nr(1)-mutant soybean plants. Purification included Blue Sepharose- and hydroxylapatite-column chromatography using acetone powders from fully
Phytotoxicity of foliar-applied urea.
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Recent work in our laboratory showed that the adverse effect of urea fertilizer on seed germination and seedling growth in soil is due to ammonia produced through hydrolysis of urea by soil urease (NH(2)CONH(2) + H(2)O --> 2NH(3) + CO(2)) and can be eliminated by amending the fertilizer with a small
Effect of chaotropic agents on reversible unfolding of a soybean (Glycine max) seed acid phosphatase.
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In this work we examined the effect of urea and guanidinium chloride on the structural stability of a single isoform of soybean seed acid phosphatase, based on the intensity of tryptophan fluorescence as a function of denaturant concentration. The free energy of unfolding, DeltaGu, was calculated at
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