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phosphofructokinase/maïs
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A strategy for designing multi-taxa specific reference gene systems. example of application--ppi phosphofructokinase (ppi-PPF) used for the detection and quantification of three taxa: maize (Zea mays), cotton (Gossypium hirsutum) and rice (Oryza sativa).
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In the first part of the paper, we report the description of a new strategy for the development of a plant reference gene system that can be used for genetically modified organism (GMO) analysis. On the basis of in silico research for candidate genes, the design of degenerate primers allowed the
Enzymes Catalyzing the Reversible Conversion of Fructose-6-Phosphate and Fructose-1,6-Bisphosphate in Maize (Zea mays L.) Kernels.
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The significance of the glycolytic and gluconeogenic conversion of fructose-6-phosphate and fructose-1,6-bisphosphate on sugar metabolism was investigated in maize (Zea mays L.) kernels. Maximum extractable activities of the pyrophosphate (PPi) dependent phosphofructokinase,
Proton transport in maize tonoplasts supported by fructose-1,6-bisphosphate cleavage. Pyrophosphate-dependent phosphofructokinase as a pyrophosphate-regenerating system.
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The energy derived from pyrophosphate (PPi) hydrolysis is used to pump protons across the tonoplast membrane, thus forming a proton gradient. In a plant's cytosol, the concentration of PPi varies between 10 and 800 microm, and the PPi concentration needed for one-half maximal activity of the maize
Chloroplast phosphofructokinase: I. Proof of phosphofructokinase activity in chloroplasts.
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Ammonium sulfate fractionation of an extract from the leaves of spinach (Spinacia oleracea L.) produced two fractions of phosphofructokinase activity, the first stimulated by inorganic phosphate and the second inhibited by inorganic phosphate. Only the second fraction was obtained from similar
Measurement of the pyrophosphate content of plant tissues.
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Pyrophosphate (PPi) was measured in pea (Pisum sativum L.) and corn (Zea mays L.) tissues by using an enzymic method based on PPi-dependent phosphofructokinase (PPi-PFK). Different organs of pea and corn seedlings were extracted to determine if PPi is present in sufficient amounts to serve as a
Response of enzymes and storage proteins of maize endosperm to nitrogen supply.
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To examine the effects of N nutrition upon endosperm development, maize (Zea mays) kernels were grown in vitro with either 0, 3.6, 7.1, 14.3, or 35.7 millimolar N. Kernels were harvested at 20 days after pollination for determination of enzyme activities and again at maturity for quantification of
Nitrogen-induced changes in the growth and metabolism of developing maize kernels grown in vitro.
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Cereal kernel growth and grain yield are functions of endosperm starch accumulation. The objective of this study was to examine how various metabolic factors in developing maize (Zea mays L.) endosperm influence starch deposition. Kernels were grown in vitro on medium with: (a) zero N (-N), (b)
Enzymes of sucrose and hexose metabolism in developing kernels of two inbreds of maize.
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Tissue distribution and activity of enzymes involved in sucrose and hexose metabolism were examined in kernels of two inbreds of maize (Zea mays L.) at progressive stages of development. Levels of sugars and starch were also quantitated throughout development. Enzyme activities studied were:
Glutathione depletion alters hepatocellular high-energy phosphate metabolism.
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Oxygen free radicals have recently been implicated as a major cause of tissue injury in critically ill patients. Glutathione (GSH) is a potent endogenous antioxidant that may be important in minimizing oxidant-induced organ damage. However, this tripeptide is depleted during severe illness. In order
Contribution of energy intake and tissue enzymatic profile to body weight gain in high-fat-fed rats.
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The purpose of the current study was to examine the enzymatic profile [phosphofructokinase (PFK), beta-hydroxyacyl-CoA dehydrogenase (HADH), and citrate synthase (CS)] in gastrocnemius muscle, heart, and liver in rats allowed ad libitum access to a high-fat diet (HFD, 45% of kcal from corn oil).
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