Results 241 to 250 of about 21,656 (280)
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Carbon isotope effect on the enzymatic decarboxylation of pyruvic acid
Biochemical and Biophysical Research Communications, 1976Abstract The decarboxylation of pyruvic acid by the thiamine pyrophosphate dependent pyruvate decarboxylase from brewer's yeast is accompanied by a carboxyl carbon isotope effect k 12 k 13 = 1.0083±0.0003 at 25°, pH 6.8. The small size of the isotope effect indicates that decarboxylation is not rate-determining in the overall ...
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Neurochemical Research, 1988
Oxidative decarboxylation of [1-14C]pyruvate was studied in primary cultures of neurons and of astrocytes. The rate of this process, which is a measure of carbon flow into the tricarboxylic acid (TCA) cycle and which is inhibited by its end product, acetyl CoA, was determined under conditions which would either elevate or reduce the components of the ...
Ch. R. K. Murthy, Leif Hertz
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Oxidative decarboxylation of [1-14C]pyruvate was studied in primary cultures of neurons and of astrocytes. The rate of this process, which is a measure of carbon flow into the tricarboxylic acid (TCA) cycle and which is inhibited by its end product, acetyl CoA, was determined under conditions which would either elevate or reduce the components of the ...
Ch. R. K. Murthy, Leif Hertz
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International Journal of Biochemistry, 1991
1. D-Glucose (0.5-16.7 mM) preferentially stimulates aerobic glycolysis and D-[3,4-14C]glucose oxidation, relative to D-[5-3H]glucose utilization in rat pancreatic islets, the concentration dependency of such a preferential effect displaying a sigmoidal pattern. 2.
Malaisse, Willy +3 more
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1. D-Glucose (0.5-16.7 mM) preferentially stimulates aerobic glycolysis and D-[3,4-14C]glucose oxidation, relative to D-[5-3H]glucose utilization in rat pancreatic islets, the concentration dependency of such a preferential effect displaying a sigmoidal pattern. 2.
Malaisse, Willy +3 more
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Pyruvate decarboxylating activity in extracts from pigeon liver acetone powder
Biochemical Medicine, 1983Extracts of pigeon liver acetone powder showed, by a radiochemical method, considerable pyruvate decarboxylating activity. The 10-30% saturated ammonium sulfate fraction of these extracts required the addition of CoA, NAD+, and TPP for maximum pyruvate decarboxylating activity and presumably contained the pyruvate dehydrogenase complex (PDHC).
John A. Barranger +1 more
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The role of electron transfer processes in the photoinduced decarboxylation of alkyl pyruvates
Journal of the Chemical Society, Perkin Transactions 2, 1983Irradiation of degassed solutions of alkyl pyruvates leads to the production of carbon dioxide, the yield of which is enhanced by the presence of electron acceptors, and in the case of methylviologen, the formation of reduced methylviologen is observed.
R. Stephen Davidson +2 more
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The effects of fatty acids on oxidative decarboxylation of pyruvate in rat small intestine
Biochimica et Biophysica Acta (BBA) - General Subjects, 1974Abstract 1. 1. Rat small intestinal epithelial cells were incubated in vitro at 30°C in bicarbonate buffer, pH 7,4, with 2 mM [1- 14 C]pyruvate. The rate of formation of 14 CO 2 was inhibited by 5 mM octanoate (58%), 5 nM d,l -3-hydroxybutyrate (37%) and 5 nM acetate (17%). No significant inhibition was observed, when 5 mM propionate was used.
W.C. Hülsmann, Jos M. J. Lamers
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Dimerization of pyruvate induced by the zinc(II)-catalysed decarboxylation of oxaloacetate
Journal of the Chemical Society, Chemical Communications, 1975The ZnII-catalysed rate of formation of pyruvate dimer(parapyruvate) is enhanced by the decarboxylation of oxac2–, providing evidence for the postulated existence of intermediate pyruvate enolate in both of these reactions.
Brian J. Lillis, Daniel L. Leussing
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Recueil des Travaux Chimiques des Pays-Bas, 1990
AbstractAcetaldehyde has been converted into pyruvic acid (42% yield) via the reaction of 2 ‐(1‐hydroxyethyl)thiamin (3) with carbon dioxide at 50 atm. (DMF, 20 C).
Leendert Maat +4 more
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AbstractAcetaldehyde has been converted into pyruvic acid (42% yield) via the reaction of 2 ‐(1‐hydroxyethyl)thiamin (3) with carbon dioxide at 50 atm. (DMF, 20 C).
Leendert Maat +4 more
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Thiamin deficiency effects on rat leukocyte pyruvate decarboxylation rates
The American Journal of Clinical Nutrition, 1978Thiamin status usually is assessed by urinary excretion of thiamin or by exogenous thiamin pyrophosphate (TPP) stimulation of erythrocyte transketolase activity. Because of the possible great utility of a biologically and chemically sensitive alternative method for thiamin status assessment, studies were made of rat leukocyte pyruvate decarboxylation ...
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Clinica Chimica Acta, 1991
We assayed the rates of lactate production from [1-14C]pyruvate and decarboxylation of [1-14C]pyruvate in cultured skin fibroblasts from 8 patients with disorders of pyruvate metabolism and 16 control subjects. The disorders of pyruvate metabolism could be more readily detected by measuring the ratio between the rates of lactate production and pyruvate
Etsuo Naito +7 more
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We assayed the rates of lactate production from [1-14C]pyruvate and decarboxylation of [1-14C]pyruvate in cultured skin fibroblasts from 8 patients with disorders of pyruvate metabolism and 16 control subjects. The disorders of pyruvate metabolism could be more readily detected by measuring the ratio between the rates of lactate production and pyruvate
Etsuo Naito +7 more
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