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Threonine Requirement and Threonine Imbalance in Broiler Chickens
Poultry Science, 1994 Three experiments were conducted to determine the effect of excess dietary protein on threonine requirement of broiler chicks to 14 d of age (Experiments 1 and 2) and to determine the threonine requirement from 16 to 28 d of age (Experiment 3). Two dietary protein levels were used in Experiments 1 and 2:20% CP in a threonine-limiting basal diet ...
R E Austic
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ENZYMATIC BREAKDOWN OF THREONINE BY THREONINE ALDOLASE [PDF]
Journal of General Physiology, 1954 1. The enzyme which splits threonine to acetaldehyde and glycine has been partially purified from rat liver (five- to sixfold purification) and the name threonine aldolase proposed for it. 2. The general properties of threonine aldolase have been studied. The enzyme is unstable to a pH below 5. The pH optimum of the enzyme reaction is at
D M Greenberg
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Stereoselective synthesis of allo-threonine and β-2H-allo-threonine from threonine
Tetrahedron Letters, 1993Both D- and L-allo-threonine can be synthesized in good yield from D- and L-threonine respectively, by protection of the amine with Fmoc and the carboxyl with a cyclic ortho ester, followed by oxidation of the side chain to a ketone, and diastereoselective reduction to the allo isomer. Deprotection gives the amino acids in 40% overall yield.
Mark A T Blaskovich, Gilles A Lajoie
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Threonine kinetics at graded threonine intakes in young men
American Journal of Clinical Nutrition, 1986A study was undertaken in eight healthy young men to examine the effects of varying intakes of threonine on plasma free threonine concentrations and threonine kinetics, using a 3 h constant intravenous infusion of L-[1-13C]threonine. Subjects consumed diets based on an L-amino acid mixture, in which the quality of threonine was reduced every 7 days. On
V R Young, Dm Bier, D M Bier
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Influence of threonine exporters on threonine production in Escherichia coli
Applied Microbiology and Biotechnology, 2002Threonine production in Escherichia coli threonine producer strains is enhanced by overexpression of the E. coli rhtB and rhtC genes or by heterologous overexpression of the gene encoding the Corynebacterium glutamicum threonine excretion carrier, thrE. Both E.
Lothar Eggeling +2 more
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Threonine Imbalance and the Threonine Requirement of the Chicken
The Journal of Nutrition, 1982Experiments were conducted to determine the influence of dietary amino acids on the threonine requirement of chicks. A diet limiting in threonine and containing the equivalent of 20.6% crude protein was imbalanced by supplements of 0.9 to 1.5% L-tryptophan, 3.0% L-serine, a mixture of 2% each, leucine, isoleucine and valine or a 6.0% mixture of all ...
A T, Davis, R E, Austic
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Archives of Microbiology, 1996
Transmembrane threonine fluxes (i.e., uptake, diffusion, and carrier-mediated excretion) all contribut-ing to threonine production by a recombinant strain of Corynebacterium glutamicum, were analyzed and quantitated. A threonine-uptake carrier that transports threonine in symport with sodium ions was identified.
PALMIERI, Luigi +3 more
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Transmembrane threonine fluxes (i.e., uptake, diffusion, and carrier-mediated excretion) all contribut-ing to threonine production by a recombinant strain of Corynebacterium glutamicum, were analyzed and quantitated. A threonine-uptake carrier that transports threonine in symport with sodium ions was identified.
PALMIERI, Luigi +3 more
openaire +1 more source
2014
Threonine aldolases catalyze the pyridoxal phosphate-dependent condensation between small amino acids (principally glycine) and aldehydes such as acetaldehyde. Carbon-carbon bond formation involves forming two adjacent chiral centers. As a rule, threonine aldolases are very stereoselective for α-carbon configuration but show modest selectivity at the β-
Sarah E, Franz, Jon D, Stewart
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Threonine aldolases catalyze the pyridoxal phosphate-dependent condensation between small amino acids (principally glycine) and aldehydes such as acetaldehyde. Carbon-carbon bond formation involves forming two adjacent chiral centers. As a rule, threonine aldolases are very stereoselective for α-carbon configuration but show modest selectivity at the β-
Sarah E, Franz, Jon D, Stewart
openaire +2 more sources