Results 221 to 230 of about 45,633 (272)
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Stereochemistry of phosphoenolpyruvate carboxylation catalyzed by phosphoenolpyruvate carboxykinase
Biochemistry, 1986The stereochemistry of the carboxylation of phosphoenolpyruvate to yield oxalacetate, catalyzed by chicken liver phosphoenolpyruvate carboxykinase and by Ascaris muscle phosphoenolpyruvate carboxykinase, was determined. The substrate (Z)-3-fluorophosphoenolpyruvate was used for the stereochemical analysis.
S H, Hwang, T, Nowak
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Facile oxygen exchanges of phosphoenolpyruvate and preparation of [18O]phosphoenolpyruvate
Biochemistry, 1983Phosphoenolpyruvate when heated in acidic solution exchanges its phosphoryl and carboxyl oxygens rapidly and its enolic oxygen much more slowly with oxygens from water. The incorporation of 18O into phosphoenolpyruvate was measured by gas chromatography-mass spectrometry and phosphorus-31 nuclear magnetic resonance after heating in H218O at 98 degrees ...
C C, O'Neal, G S, Bild, L T, Smith
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Mitochondrial phosphoenolpyruvate carboxykinase deficiency
European Journal of Pediatrics, 1986A 3-month-old girl presented with anorexia, failure to thrive and drowsiness. She was mildly icteric with hepatomegaly and peripheral oedema. Disordered liver function tests were associated with the biopsy appearances of a giant cell hepatitis and with a Fanconi syndrome. At the age of 16 weeks she collapsed with profound hypoglycaemia.
J V, Leonard +3 more
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Hydrolysis of phosphoenolpyruvate catalyzed by phosphoenolpyruvate carboxylase from Zea mays
Biochemistry, 1992In addition to the normal carboxylation reaction, phosphoenolpyruvate carboxylase from Zea mays catalyzes a HCO3(-)-dependent hydrolysis of phosphoenolpyruvate to pyruvate and Pi. Two independent methods were used to establish this reaction. First, the formation of pyruvate was coupled to lactate dehydrogenase in assay solutions containing high ...
S L, Ausenhus, M H, O'Leary
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Acta Crystallographica Section B Structural Science, 1996
The crystal structure of (C6H11NH3 +)3.Pep3−.H2O, where Pep3− = (O−)2P(O)—O—C(CH2)—CO− 2, is reported and the systematic structural variations among 19 crystallographic occurrences of H3Pep, H2Pep−, HPep2− and Pep3− species, which are important phosphate donors in the ATP cycle of bioenergetics, are reviewed.
M, Souhassou +2 more
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The crystal structure of (C6H11NH3 +)3.Pep3−.H2O, where Pep3− = (O−)2P(O)—O—C(CH2)—CO− 2, is reported and the systematic structural variations among 19 crystallographic occurrences of H3Pep, H2Pep−, HPep2− and Pep3− species, which are important phosphate donors in the ATP cycle of bioenergetics, are reviewed.
M, Souhassou +2 more
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Biochemistry, 1984
The halogenated phosphoenolpyruvate analogues (Z)-phosphoenol-3-fluoropyruvate, (E)-phosphoenol-3-fluoropyruvate, and (Z)-phosphoenol-3-bromopyruvate were synthesized and purified. The analogues were characterized by 1H and by 19F NMR where applicable.
T H, Duffy, T, Nowak
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The halogenated phosphoenolpyruvate analogues (Z)-phosphoenol-3-fluoropyruvate, (E)-phosphoenol-3-fluoropyruvate, and (Z)-phosphoenol-3-bromopyruvate were synthesized and purified. The analogues were characterized by 1H and by 19F NMR where applicable.
T H, Duffy, T, Nowak
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A simplified assay for phosphoenolpyruvate
Analytical Biochemistry, 1975Abstract A new method for analysis of phosphoenolpyruvate has been developed. The assay is based upon the stoichiometric conversion of ADP to ATP by the enzyme pyruvate kinase in the presence of variable amounts of PEP, and subsequent measurement of the ATP with a luciferin-luciferase preparation.
G D, McCoy, K A, Doeg
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Evolution of C4 phosphoenolpyruvate carboxylase
Archives of Biochemistry and Biophysics, 2003C4 plants are known to be of polyphyletic origin and to have evolved independently several times during the evolution of angiosperms. This implies that the C4 isoform of phosphoenolpyruvate carboxylase (PEPC) originated from a nonphotosynthetic PEPC gene that was already present in the C3 ancestral species.
Per, Svensson +2 more
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Phosphoenolpyruvate carboxykinase activity in invertebrates
Comparative Biochemistry and Physiology, 1964Abstract 1. 1. The presence of P-enolpyruvate carboxykinase has been demonstrated in nine species of molluscs and one species of coelenterate. In most, the activity was considerably higher than in rat liver and in some of them the activity was much higher than in chicken liver. 2. 2.
J W, SIMPSON, J, AWAPARA
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