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Sida 1 från 28 resultat
Potato tuber isoapyrases: substrate specificity, affinity labeling, and proteolytic susceptibility.
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Apyrase/ATP-diphosphohydrolase hydrolyzes di- and triphosphorylated nucleosides in the presence of a bivalent ion with sequential release of orthophosphate. We performed studies of substrate specificity on homogeneous isoapyrases from two potato tuber clonal varieties: Desiree (low ATPase/ADPase
Regulation by phosphorylation of Xenopus laevis poly(ADP-ribose) polymerase enzyme activity during oocyte maturation.
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Poly(ADP-ribose) polymerase (PARP) is an abundant nuclear enzyme that is dependent on DNA breaks and nicks for its enzyme activity. These DNA nicks and breaks function as allosteric effectors of the enzyme activity. This reaction is important for efficient DNA base excision repair, although it is
The route of non-enzymic and enzymic breakdown of 5-phosphoribosyl 1-pyrophosphate to ribose 1-phosphate.
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Spontaneous decomposition of 5-phosphoribosyl 1-pyrophosphate at pH 5.5 was established to occur as follows: 5-Phosphoribosyl 1-pyrophosphate----5-phosphoribosyl 1,2-(cyclic)phosphate----ribose 1-phosphate----ribose Enzymic degradation of 5-phosphoribosyl 1-pyrophosphate by alkaline phosphatase from
Ralstonia solanacearum Race 3, Biovar 2, the Causal Agent of Brown Rot of Potato, Identified in Geraniums in Pennsylvania, Delaware, and Connecticut.
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The Plant Disease Diagnostic Laboratory of the Pennsylvania Department of Agriculture received diseased geranium (Pelargonium × hortorum) samples from several Pennsylvania (PA) greenhouses in 1999 and 2000 and from one Delaware (DE) greenhouse in 1999. Originating from Guatemala, plants exhibited
Pathways of starch and sucrose biosynthesis in developing tubers of potato (Solanum tuberosum L.) and seeds of faba bean (Vicia faba L.) : Elucidation by (13)C-nuclear-magnetic-resonance spectroscopy.
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Tissue slices from developing potato tubers (Solanum tuberosum L.) and developing cotyledons of faba bean (Vicia faba L.) were incubated with specifically labelled [(13)C]glucose and [(13)C]ribose. Enriched[(13)C]glucose released from starch granules was analysed by nuclear magnetic resonance (NMR).
Purple sweet potato pigments protect murine thymocytes from ⁶⁰Co γ-ray-induced mitochondria-mediated apoptosis.
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OBJECTIVE
Purple sweet potato (PSP) pigments have been widely accepted as antioxidants but their radioprotective effect still remains unclear. In this study we investigated the effect of PSP pigments on ⁶⁰Co γ-ray-induced mitochondria-mediated apoptosis in murine thymocytes.
METHODS
The murine
Insecticidal activity of some reducing sugars against the sweet potato whitefly, Bemisia tabaci, Biotype B.
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The effects of 16 sugars (arabinose, cellobiose, fructose, galactose, gentiobiose, glucose, inositol, lactose, maltose, mannitol (a sugar alcohol), mannose, melibiose, ribose, sorbitol, trehalose, and xylose) on sweet potato whitefly Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) survival were
Activation of mammalian phosphofructokinases by ribose 1,5-bisphosphate.
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Ribose 1,5-bisphosphate (Rib-1,5-P2), a newly discovered activator of rat brain phosphofructokinase, forms rapidly during the initiation of glycolytic flux and disappears within 20 s (Ogushi, S., Lawson, J.W. R., Dobson, G.P., Veech, R.L., and Uyeda, K. (1990) J. Biol. Chem. 265, 10943-10949).
Induction of alcohol dehydrogenase in explants of potato tuber (Solanum tuberosum L.).
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During callus formation a huge increase in alcoholdehydrogenase activity was observed in potato tuber tissue discs. Callus formation was no prerequisite for this increase; slicing and subsequent incubation of potato tuber tissue discs always led to an increase in alcohol dehydrogenase activity,
A cell wall-bound adenosine nucleosidase is involved in the salvage of extracellular ATP in Solanum tuberosum.
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Extracellular ATP (eATP) has recently been demonstrated to play a crucial role in plant development and growth. To investigate the fate of eATP within the apoplast, we used intact potato (Solanum tuberosum) tuber slices as an experimental system enabling access to the apoplast without interference
Modulation of allosteric regulation by E38K and G101N mutations in the potato tuber ADP-glucose pyrophosphorylase.
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The higher plant ADP-glucose (ADPG) pyrophosphorylase (AGPase), composed of two small subunits and two large subunits (LSs), produces ADPG, the sole substrate for starch biosynthesis from α-D-glucose 1-phosphate and ATP. This enzyme controls a key step in starch synthesis as its catalytic activity
The bioactive compounds alpha-chaconine and gallic acid in potato extracts decrease survival and induce apoptosis in LNCaP and PC3 prostate cancer cells.
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We recently reported that colored potato extracts and an anthocyanin rich fraction suppressed lymph-node carcinoma of the prostate (LNCaP) and prostate cancer-3 (PC-3) prostate cancer cell proliferation and induced apoptosis via caspase-dependent and caspase-independent pathways. Chlorogenic acid,
Kribbella solani sp. nov. and Kribbella jejuensis sp. nov., isolated from potato tuber and soil in Jeju, Korea.
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Two actinomycete strains, DSA1T and HD9T, were isolated from a potato tuber and soil from a potato-cultivating field in Jeju, Korea, respectively. A comprehensive 16S rDNA analysis revealed that the isolates belong to the genus Kribbella and share 97.7-98.6% sequence similarity to Kribbella species.
Purple Sweet Potato Leaf Extract Induces Apoptosis and Reduces Inflammatory Adipokine Expression in 3T3-L1 Differentiated Adipocytes.
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Background. Purple sweet potato leaves (PSPL) are widely grown and are considered a healthy vegetable in Taiwan. PSPL contain a high content of flavonoids, and the boiling water-extracted PSPL (PSPLE) is believed to prevent metabolic syndrome. However, its efficacy has not yet been verified.
Polyphenol-rich sweet potato greens extract inhibits proliferation and induces apoptosis in prostate cancer cells in vitro and in vivo.
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Sweet potato (Ipomoea batatas) leaves or greens, extensively consumed as a vegetable in Africa and Asia, are an excellent source of dietary polyphenols such as anthocyanins and phenolic acids. Here, we show that sweet potato greens extract (SPGE) has the maximum polyphenol content compared with
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