Synthetase activity
Measurement of δ Aminolevulinic Acid Synthetase Activity in Human Erythroblasts
... (ALA) synthetase activity in human bone marrow cells has been ...ALA synthetase of erythroblasts was partially purified so as to permit the use of [ 14 C]succinyl-CoA as a substrate for this ...
10
Decreased Red Cell Uroporphyrinogen I Synthetase Activity in Intermittent Acute Porphyria
... I synthetase activity and increased d-aminolevulinic acid synthetase ...I synthetase may be reflected in nonhepatic tissues, we have assayed this enzyme in red cell hemolysates from ...
8
EFFECT OF GENE DOSAGE ON TRYPTOPHAN SYNTHETASE ACTIVITY IN SACCHAROMYCES CEREVISIAE
... The determination of DNA content per cell performed with the aim of imple- menting the information on the macromolecular components of a polyploid series confirms OGUR’S data [r] ...
10
The freshwater Amazonian stingray, Potamotrygon motoro, up regulates glutamine synthetase activity and protein abundance, and accumulates glutamine when exposed to brackish (15‰) water
... The protein abundance of GS was determined using affinity- purified rabbit polyclonal antibodies raised against the KLH- conjugated highly conserved oligopepetide GS sequence (acetylcysteinyl-CPRSVGQEKKG–YFEDRRPS-amide) ...
9
STUDIES ON A SERIES OF TRYPTOPHAN-INDEPENDENT STRAINS DERIVED FROM A TRYPTOPHAN-REQUIRING MUTANT OF ESCHERICHIA COLI
... Tryptophan synthetase activity in extracts of selected suppressed strains and reuertants: To determine whether tryptophan synthetase activity is correlated with growth ra[r] ...
19
EFFECT OF VAM AND AZOSPlRILLUM BRASILENSE ON PHOTO SYNTHESIS, NITROGEN METABOLISM AND GRAIN YIELD IN WHEAT J.D.S. PANWAR
... Effect of VAM and Azospirillum brasilense on chlorophyll content, Photosynthetic rate (Ps), Nitrate reductase (NRA) and glutamine synthetase activity (OS) in the le[r] ...
5
Genomic, biochemical and modelling analyses of asparagine synthetases from wheat
... Asparagine synthetase activity in cereals has become an important issue with the discovery that free asparagine concentration determines the potential for formation of acrylamide, a probably carcinogenic ...
41
A Dominant Negative Effect of eth-1r, a Mutant Allele of the Neurospora crassa S-Adenosylmethionine Synthetase-Encoding Gene Conferring Resistance to the Methionine Toxic Analogue Ethionine
... adenosylethionine, due to reduced AdoMet synthetase activity, as well as dilution of ethionine due to accumula- tion of methionine, are the combined basis of ethionine r[r] ...
8
Cysteine Activation in Cultured Cystinotic Cells THE SPECIFIC ACTIVITY OF CYSTEINYL tRNA SYNTHETASE AND tRNACys AND THE DETERMINATION OF THE MICHAELISMENTEN CONSTANTS FOR CYSTEINYL tRNA SYNTHETASE
... cysteinyl-tRNA synthetase might lead to the faulty regulation of cyst(e)ine levels in cystinotic ...cysteinyl-tRNA synthetase activity, and the K m of cysteine, ATP, and tRNA Cys for cysteinyl-tRNA ...
7
Altered vitamin B12 metabolism in fibroblasts from a patient with megaloblastic anemia and homocystinuria due to a new defect in methionine biosynthesis
... methionine synthetase, the proportion of intracellular cobalamin which was methyl-B12 was below normal and in the range observed in cobalamin C and D ...holoenzyme activity of methionine synthetase ...
9
Mutant holocarboxylase synthetase: evidence for the enzyme defect in early infantile biotin responsive multiple carboxylase deficiency
... holocarboxylase synthetase activity with a maximum velocity about 30-40% of normal, a Km for ATP of ...holocarboxylase synthetase activity, and thus a genetic defect of the metabolism of ...
6
ATP dependent ligases in trypanothione biosynthesis – kinetics of catalysis and inhibition by phosphinic acid pseudopeptides
... The synthetase activity of EcGspS was inhib- ited by a phosphonate tetrahedral mimic, in a noncom- petitive, time-independent manner with K i 10 l ...
14
Characterization of nitrogen metabolism and photosynthesis in a stay-green rice cultivar
... Abstract: A field experiment was carried out in the years 2008–2011 in China to assess the nitrogen metabolism enzy- me activities and photosynthetic characteristics in stable-yielding stay-green rice (Oryza sativa L.) ...
7
Nitric oxide loading of the salivary nitric oxide carrying hemoproteins (nitrophorins) in the blood sucking bug Rhodnius prolixus
... prolixus are formed by a single layer of binucleated epithelial cells surrounded by a double layer of transversely oriented smooth muscle cells. The epithelial cells are rich in rough endoplasmic reticulum and ...
6
In vitro suppression of inflammatory cytokine response by methionine sulfoximine
... glutamine synthetase activity, along with depletion of extracellular glutamine caused the largest decrease in IL-6 secretion that we ob- served in our experiments ...
12
ASPARAGINE-REQUIRING TUMOR CELL LINES AND THEIR NON-REQUIRING VARIANTS: CYTOGENETICS, BIOCHEMISTRY AND POPULATION DYNAMICS
... ( 5 ) A somatic cell hybrid between Chinese hamster cells (which require asparagine at low densities, and possess measurable synthetase activity) and the Walker line was f[r] ...
12
The Relationship between R&D Investment and Dividend Payment Tax Incentives and Their Role in the Dividend Tax Puzzle
... mouse Oas1 proteins to multimerize has not yet been investigated. The CFK motif is conserved in the full-length Oas1b protein, but the Oas1a protein contains a K to I substitution in this motif and it is possible that ...
87
The effect of inhibition of prostaglandin synthesis on urinary sodium excretion in the conscious dog
... competes with arachidonic acid for prostaglandin synthetase activity.' As a competitive inhibitor of prostaglandin synthesis, the addition of excess arachidonic acid after administration[r] ...
6
Decreased rates of methionine synthesis by methylene tetrahydrofolate reductase deficient fibroblasts and lymphoblasts
... enzyme activity in cell extracts which agrees less precisely with the clinical status of the ...methionine synthetase activity, the rate of synthesis of methionine from homocysteine is a function of ...
7
Click here to download PDF version of the article !
... As NO is a free radical, it is a highly reactive molecule within biological systems, reacting with other free radicals, molecular oxygen and heavy metals. It has been suggested that the biological effects of NO can be ...
11