Results 171 to 180 of about 7,576 (203)

d-Xylose transport in the chicken small intestine

Comparative Biochemistry and Physiology, 1967
Abstract 1. 1. d -Xylose enters rings of chicken small intestine, in vitro , significantly faster and to a greater extent than its epimer at carbon-2, d -lyxose. Final distribution of lyxose is indistinguishable from the extracellular space. 2. 2. Xylose, but not lyxose entry exhibits saturation kinetics. 3. 3.
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The kinetics and regulation of M-xylose transport in Candida utilis

World Journal of Microbiology and Biotechnology, 1993
Low-affinity (K m=67.6±3.2 mM) and high-affinity (K m=1.9±1.2 mM) D-xylose transport occur in Candida utilis grown, respectively, on D-glucose or D-xylose. Starvation of glucose-grown cells decreases the K m value (10.5±2.6 mm). The high-affinity system appearing during starvation required protein synthesis and it was inactivated when cells were ...
S G, Kilian, B A, Prior, J C, du Preez
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Molecular Simulations of Solute Transport in Xylose Isomerase Crystals

The Journal of Physical Chemistry B, 2008
Cross-linked enzyme crystals (CLECs) enclose an extensive regular matrix of chiral solvent-filled nanopores, via which ions and solutes travel in and out. Several cross-linked enzyme crystals have recently been used for chiral separation and as biocatalysts. We studied the dynamics of solute transport in orthorhombic d-xylose isomerase (XI) crystals by
Kourosh, Malek, Marc-Olivier, Coppens
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Transport of D-xylose and sugar space in baker's yeast

Folia Microbiologica, 1963
The cell volume fraction ofSaccharomyces cerevisiae accessible tod-xylose and other nonmetabolized sugars was found to correspond to 100% of cell water in resting yeast over a range of osmolarities of the medium. This sugar space was decreased to 60% by nitrogen deficiency and to 82% by phosphorus deficiency.
A, KOTYK, A, KLEINZELLER
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d-xylose active transport in the hamster small intestine

Biochimica et Biophysica Acta (BBA) - Biophysics including Photosynthesis, 1966
Abstract D -Xylose is accumulated by rings of hamster small intestine, in vitro, through the same equilibrating mobile-carrier mechanism involved in glucose active transport. It is not necessary to postulate the presence of a distinct accumulation step in order to explain energy-dependent sugar accumulation. The experimental evidence is as follows:
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Xylose and xylose/glucose co-fermentation by recombinant Saccharomyces cerevisiae strains expressing individual hexose transporters

Enzyme and Microbial Technology, 2014
Since the uptake of xylose is believed to be one of the rate-limiting steps for xylose ethanol fermentation by recombinant Saccharomyces cerevisiae strains, we transformed a hxt-null strain lacking the major hexose transporters (hxt1Δ-hxt7Δ and gal2Δ) with an integrative plasmid to overexpress the genes for xylose reductase (XYL1), xylitol ...
Davi L, Gonçalves, Akinori, Matsushika, Belisa B, de Sales, Tetsuya, Goshima, Elba P S, Bon, Boris U, Stambuk   +5 more
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Xylose transport in yeast for lignocellulosic ethanol production: Current status

Journal of Bioscience and Bioengineering, 2018
Lignocellulosic ethanol has been considered as an alternative transportation fuel. Utilization of hemicellulosic fraction in lignocelluloses is crucial in economical production of lignocellulosic ethanol. However, this fraction has not efficiently been utilized by traditional yeast Saccharomyces cerevisiae. Genetically modified S. cerevisiae, which can
Nilesh Kumar Sharma, Shuvashish Behera, Richa Arora, Sachin Kumar, Rajesh K. Sani   +4 more
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Effect of xylose incubation on the glucose transport system in Saccharomyces cerevisiae

Biochimica et Biophysica Acta (BBA) - Biomembranes, 1986
Incubation of Saccharomyces cerevisiae with xylose and ethanol for 16 hours leads to a decrease of hexokinase (and glucokinase) activity in the cells. It does not alter the levels of polyphosphate, orthophosphate and ATP. The transport of the glucose derivative 2-deoxy-D-glucose, a sugar that can be phosphorylated, is inhibited after this treatment ...
J, Schuddemat, P J, Van den Broek, J, Van Steveninck   +2 more
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D-Xylose Transport In Human Intestine

Journal of Pediatric Gastroenterology and Nutrition, 1986
M, Heyman, J F, Desjeux
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[D-xylose transport in cultured mammalian cells].

Tsitologiia, 1980
The uptake of D-xylose by CHO-K1 cells in monolayer conditions, and by suspended L- and HeLa cells has been studied. The initial velocity is a function of exogenous xylose concentration. The estimated kinetic constants, Km and Vmax, at 37 degrees were, resp., 20 mM and 10 mmol/min for CHO cells, 12.5 mM and 2.8 mmol/min for L-cells, and at 16 degrees ...
N A, Vinogradova, N N, Nikol'skiĭ, E G, Semenova   +2 more
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