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Strana 1 od 46 výsledky
Transport of glycine, serine, and proline into spinach leaf mitochondria.
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The transport of radioactive glycine, serine, and proline into the matrix of spinach leaf mitochondria was studied using the silicone oil centrifugation technique. The uptake of all three amino acids showed a biphasic characteristic. At concentrations higher than 0.5 mM, an apparent diffusion
Reaction-intermediate analogue binding by ribulose bisphosphate carboxylase/oxygenase causes specific changes in proteolytic sensitivity: the amino-terminal residue of the large subunit is acetylated proline.
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Trypsin rapidly inactivated the catalytic activities of spinach ribulose bisphosphate carboxylase/oxygenase [3-phospho-D-glycerate carboxy-lyase (dimerizing), EC 4.1.1.39], but the stoichiometry of binding of the reaction-intermediate analogue carboxyarabinitol bisphosphate was only slightly reduced
Nucleotide sequence of a spinach chloroplast proline tRNA.
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The nucleotide sequence of a spinach chloroplast proline tRNA (sp. chl. tRNApro) has been determined. This tRNA shows more overall homology to phage T4 proline tRNA (61% homology) than to eukaryotic proline tRNAs (53% homology) or mitochondrial proline tRNAs (36-49% homology). Sp. chl. tRNApro, like
Interactions of proline, serine, and leucine with isolated spinach thylakoids: solute loading during freezing is not related to membrane fluidity.
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We have investigated the physical mechanisms through which amino acids influence freeze-thaw damage to isolated spinach (Spinacia oleracea L.) thylakoid membranes. The cryoprotective amino acid proline reduced osmotic membrane rupture during thawing by reducing solute loading of thylakoids during
Evaluation of potential cationic probes for the detection of proline and betaine.
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Osmoregulants are the substances that help plants to tolerate environmental extremes such as salinity and drought. Proline and betaine are two of the most commonly studied osmoregulants. An indirect UV CE method has been developed for simultaneous determination of these osmoregulants. A variety of
Proline Oxidase and Water Stress-induced Proline Accumulation in Spinach Leaves.
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Spinach (Spinacia oleracea L.) leaf discs accumulated free proline when exposed to polyethylene glycol solutions of water potential less than -10 bars. At -20 bars, the accumulation was 11 micromoles per gram original fresh weight in a 24-hour period.When the leaf organelles were separated on a
Phosphorylation of synthetic peptides by a CDPK and plant SNF1-related protein kinase. Influence of proline and basic amino acid residues at selected positions.
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Spinach (Spinacia oleracea L.) leaf sucrose-phosphate synthase (SPS) can be inactivated by phosphorylation of Ser-158 by calmodulin-like domain protein kinases (CDPKs) or SNF1-related protein kinases (SnRK1) in vitro. While the phosphorylation site sequence is relatively conserved, most of the
Purification and characterization of Delta(1)-pyrroline-5-carboxylate reductase isoenzymes, indicating differential distribution in spinach (Spinacia oleracea L.) leaves.
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Delta(1)-Pyrroline-5-carboxylate reductase (P5CR) (EC 1.5.1.2. L-proline: NAD(P)-5-oxidoreductase), the second enzyme in the proline biosynthetic pathway, was purified from spinach (Spinacia oleracea L.) leaves. Following ammonium sulfate fractionation, purification was performed by several
Atmospheric application of trace amounts of nitric oxide enhances tolerance to salt stress and improves nutritional quality in spinach (Spinacia oleracea L.).
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The increased salinity in greenhouses has become a problem of great concern. In this study, it was observed that the salt-induced oxidative damages (indicated by MDA, H2O2 and antioxidant enzymes, including POD, SOD and CAT) could be alleviated by application of NO gas. Consequently, although both
Crystal structure of plantacyanin, a basic blue cupredoxin from spinach.
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The crystal structure of the basic blue protein (plantacyanin) from spinach (SBP) has been solved to a resolution of 2.05 A by molecular replacement using the homologous protein from cucumber (CBP) as a model. Although the sequence identity of 58% between both proteins is only moderate, the
Effect of lead stress on mineral content and growth of wheat (Triticum aestivum) and spinach (Spinacia oleracea) seedlings.
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Lead (Pb) is the most common heavy metal contaminant in the environment. Pb is not an essential element for plants, but they absorb it when it is present in their environment, especially in rural areas when the soil is polluted by automotive exhaust and in fields contaminated with fertilizers
Cellular fructose-P2 aldolase has a derivatized (blocked) NH2 terminus.
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Fructose-P2 aldolases isolated from vertebrate skeletal muscle have underivatized NH2-terminal proline residues in contrast to most other cytoplasmic proteins which contain alpha-N-acetylated termini. However, if "native" aldolase molecules derived from chicken muscle, rat liver, wheat germ, and the
Gene expression during cold acclimation in strawberry.
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To elucidate the molecular basis of cold acclimation in strawberry (Fragaria x anannassa), we have begun studies to identify genes associated with low temperature (LT) acclimation. Differential screening of a cDNA library prepared from cold-acclimated strawberry plants allowed us to isolate several
Novel Insights from Comparative In Silico Analysis of Green Microalgal Cellulases.
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The assumption that cellulose degradation and assimilation can only be carried out by heterotrophic organisms was shattered in 2012 when it was discovered that the unicellular green alga, Chlamydomonas reinhardtii (Cr), can utilize cellulose for growth under CO₂-limiting conditions. Publications of
Role of the carboxy terminus of polypeptide D1 in the assembly of a functional water-oxidizing manganese cluster in photosystem II of the cyanobacterium Synechocystis sp. PCC 6803: assembly requires a free carboxyl group at C-terminal position 344.
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The D1 polypeptide of the photosystem II (PSII) reaction center is synthesized as a precursor polypeptide which is posttranslationally processed at the carboxy terminus. It has been shown in spinach that such processing removes nine amino acids, leaving Ala344 as the C-terminal residue [Takahashi,
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