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Página 1 a partir de 31 resultados
Identification and characterization of proteins involved in rice urea and arginine catabolism.
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Rice (Oryza sativa) production relies strongly on nitrogen (N) fertilization with urea, but the proteins involved in rice urea metabolism have not yet been characterized. Coding sequences for rice arginase, urease, and the urease accessory proteins D (UreD), F (UreF), and G (UreG) involved in urease
Wildfire of Soybean Caused by Pseudomonas syringae pv. tabaci, a New Disease in Korea.
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In 2006 and 2007, a new bacterial disease was observed in field-cultivated soybeans in Boeun District and Munkyung City of Korea. The disease caused severe blighting of soybean (Glycine max) leaves. Soybean leaves in fields showed yellowish spots with brown centers. Brown and dead areas of variable
Sweet potato feathery mottle potyvirus (C1 isolate) virion and RNA purification.
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A procedure for the purification of a Peruvian isolate (C1) of sweet potato feathery mottle potyvirus (SPFMV) and infective RNA has been developed. The use of Hepes [N-(2-hydroxyethyl)piperazine-N'-2-ethanesulfonic acid] buffer containing urea and sodium EDTA as a base for tissue extraction and
The mechanism of herbicide resistance in tobacco cells with a new mutation in the q(b) protein.
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A new mutant of the psbA gene conferring resistance to 2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine (atrazine) was obtained by selection of photomixotrophic tobacco (Nicotiana tabacum cv Samsun NN) cells. The 264th codon AGT (serine) in the wild psbA gene was changed to ACT (threonine) in
Maternal inheritance of cytochrome f in interspecific Nicotiana hybrids.
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Cytochrome f has been purified to homogeneity, as judged by polyacrylamide gel electrophoresis, from the leaves of Nicotiana tabacum, Nicotiana glutinosa and their reciprocal hybrids. The cytochrome was extracted from chloroplast membranes by sonication in 2% Triton X-100 and 4M urea and was
Cell-specific expression of the mercury-insensitive plasma-membrane aquaporin NtAQP1 from Nicotiana tabacum.
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The aquaporin NtAQP1 from Nicotiana tabacum L. is insensitive to heavy-metal ions. In addition to water, the transport of urea or glycerol is facilitated by this plasma-membrane-located water channel. Northern hybridization and whole-mount in situ hybridization revealed a high steady-state level of
Purification and characterization of 8 of the pathogenesis-related proteins in tobacco leaves reacting hypersensitively to tobacco mosaic virus.
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Leaves of tobacco plants (Nicotiana tabacum cv. Samsun NN) which are reacting hypersensitively to infection with tobacco mosaic virus contain 10 major pathogenesis-related (PR) proteins which are absent, or present in small amounts in uninfected leaves. We describe here a preparative procedure of
Initial organic products of assimilation of [N]ammonium and [N]nitrate by tobacco cells cultured on different sources of nitrogen.
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Glutamine is the first major organic product of assimilation of (13)NH(4) (+) by tobacco (Nicotiana tabacum L. cv. Xanthi) cells cultured on nitrate, urea, or ammonium succinate as the sole source of nitrogen, and of (13)NO(3) (-) by tobacco cells cultured on nitrate. The percentage of organic (13)N
Different forms of African cassava mosaic virus capsid protein within plants and virions.
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One geminiviral gene encodes the capsid protein (CP), which can appear as several bands after electrophoresis depending on virus and plant. African cassava mosaic virus-Nigeria CP in Nicotiana benthamiana, however, yielded one band (~ 30 kDa) in total protein extracts and purified virions, although
Fractionation and characterization of histones from barley (Hordeum vulgare) leaves : Existence of multiple H2A and H2B variants.
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Histones were extracted from purified nuclei isolated from four cereals,viz. barley (Hordeum vulgare), wheat(Triticum aestivum), Aegilops squarrosa and corn (Zea mais), and from tobacco (Nicotiana tabacum). Analysis of the histones on SDS gels showed complex electrophoretic patterns with one species
Transient expression of the influenza A virus PB1-F2 protein using a plum pox virus-based vector in Nicotiana benthamiana.
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PB1-F2 protein of influenza A virus (IAV) was cloned in a plum pox virus (PPV) genome-based vector and attempts to express it in biolistically transfected Nicotiana benthamiana plants were performed. The vector-insert construct replicated in infected plants properly and was stable during repeated
Fluorometric quantification of green fluorescent protein in tobacco leaf extracts.
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The main use of green fluorescent protein (GFP) is as a reporter system, where the existence of the protein is usually determined visually using fluorescent microscopy. Although fluorescence-based quantification of GFP is possible, background fluorescence in plants and in plant extracts was observed
Analysis of catalytic subunit microheterogeneity in ribulosebisphosphate carboxylase/oxygenase from Nicotiana tabacum.
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Urea isoelectric focusing of dissociated, carboxymethylated Nicotiana tabacum ribulose-1,5-bisphosphate carboxylase/oxygenase reveals catalytic subunit microheterogeneity. Aggregated or nonaggregated sucrose gradient-purified preparations and the crystalline protein displayed essentially identical
Effect of allopurinol on the utilization of purine degradation pathway intermediates by tobacco cell cultures.
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Suspension cultured Nicotiana tabacum (tobacco) cells grow slowly on intermediates of the purine degradation pathway (hypoxanthine, xanthine, uric acid, allantoin, and urea) as their sole nitrogen source indicating that this degradation pathway is operative in these cells. The hypoxanthine analog,
SOME EFFECTS OF IODINE AND OTHER REAGENTS ON THE STRUCTURE AND ACTIVITY OF TOBACCO MOSAIC VIRUS.
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1. Denatured tobacco mosaic virus has a number of SH groups corresponding to its total sulfur content of 0.2 per cent. The SH groups were estimated by titration with ferricyanide, tetrathionate, and p-chloromercuribenzoate in guanidine hydrochloride solution and by reduction of the uric acid reagent
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