Nitrate reductases from leaves of Ricinus (Ricinus communis L.) and spinach (Spinacia oleracea L.) have different regulatory properties

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Nitrate reductases from leaves of Ricinus (Ricinus communis L.) and spinach (Spinacia oleracea L.) have different regulatory properties.

The activity of nitrate reductase (+Mg(2+), NR(act)) in illuminated leaves from spinach, barley and pea was 50-80% of the maximum activity (+EDTA, NR(max)). However, NR from leaves of Ricinus communis L. had a 10-fold lower NR(act), while NR(max) was similar to that in spinach leaves. The low NR(act) of Ricinus was independent of day-time and nitrate nutrition, and varied only slightly with lea...

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Antinociceptive activity of Ricinus communis L. leaves.

OBJECTIVE To evaluate the antinociceptive activity of the methanol extract of Ricinus communis leaves (MRCL). METHODS Antinociceptive activity was evaluated using acetic acid induced writhing test, formalin induced paw licking and tail immersion method in mice at doses of 100, 125 and 150 mg/kg bw. RESULTS The results indicated that MRCL exhibited considerable antinociceptive activity again...

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Synthase Gene from Ricinus communis L

1 L-myo-Inositol-1-phosphate synthase (EC 5.5.1.4, MIPS), an evolutionarily conserved enzyme protein, catalyzes the conversion of D-glucose-6-phosphate into 1 L-myo-inositol-1-phosphate (MIP), which is the fi rst and rate-limiting step in the biosynthesis of all inositol-containing compounds (Ray Chaudhuri et al., 1997; Abid et al., 2009). MIPS is found in diverse organisms, both eukaryotic and...

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Differences in the metabolite profiles of spinach (Spinacia oleracea L.) leaf in different concentrations of nitrate in the culture solution.

The nitrogen (N) status of a plant determines the composition of its major components (amino acids, proteins, carbohydrates and organic acids) and, directly or indirectly, affects the quality of agricultural products in terms of their calorific value and taste. Although these effects are guided by changes in metabolic pathways, no overall metabolic analysis has previously been conducted to demo...

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The amino acid sequence of sesame (Sesamum indicum L.) and castor (Ricinus communis L.) cytochrome c.

The amino acid sequences of sesame (Sesamum indicum L.) and castor (Ricinus communis L.) cytochrome c were determined by using 1.5mumol of protein from each species. Both molecules consist of a single chain of 111 amino acid residues and are homologous with other mitochondrial cytochrome c molecules. Both have an N-acetylated ;tail' of eight amino acids and two in-N-trimethyl-lysine residues, a...

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ژورنال

عنوان ژورنال: Journal of Experimental Botany

سال: 2000

ISSN: 1460-2431

DOI: 10.1093/jexbot/51.347.1099