Results 191 to 200 of about 78,410 (212)
Some of the next articles are maybe not open access.
The optical specificity of glutamine synthetase
Archives of Biochemistry and Biophysics, 1960The optical specificity of the glutamine synthetase isolated from dried peas has been studied. The degree of optical specificity shown by the enzyme is a function of the pH, the activating meta-lion concentration, the metal-ion species and the concentration of ammonia or hydroxylamine.
openaire +3 more sources
Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology, 2008
Glutamine plays important roles in the interorgan transport of nitrogen, carbon and energy but little is known about glutamine metabolism in the horse. In this study we determined the tissue distribution of glutamine synthetase expression in three Standardbred mares.
Malcolm Watford +5 more
openaire +3 more sources
Glutamine plays important roles in the interorgan transport of nitrogen, carbon and energy but little is known about glutamine metabolism in the horse. In this study we determined the tissue distribution of glutamine synthetase expression in three Standardbred mares.
Malcolm Watford +5 more
openaire +3 more sources
Glutamine synthetase in the avian diencephalon
Journal of Experimental Zoology, 1973AbstractGlutamine synthetase (GS) activities are high in the nucleus rotundus of the avian diencephalon in late embryos and hatched chicks. The nucleus rotundus is known to be one component of a visual pathway in birds involving also the neural retina, the optic tectum and the cerebral ectostriatum.
openaire +3 more sources
Messenger RNA for glutamine synthetase
Molecular and Cellular Biochemistry, 1983Of the various eucaryotic tissues, where glutamine synthetase (GS) mRNA and its regulation have been investigated, the induction of GS by glucocorticoids in the embryonic chick retina represents one of the systems most extensively studied. GS mRNA was first identified at the polysomal level by immunochemical precipitation of fractionated polysomes ...
P K Sarkar, S Chaudhury
openaire +4 more sources
Conversion of glutamic acid to glutamine by retinal glutamine synthetase
Experimental Eye Research, 1973Abstract There is a qualitative correlation within a given retinal tissue between level of glutamine synthetase, as measured by its transferase activity, and ability of the tissue to convert glutamic acid to glutamine in vitro. The present study shows this to be the case for age-dependent endogenous enzyme activity, cortisol-induced enzyme activity ...
Liane Reif-Lehrer +3 more
openaire +3 more sources
The Journal of Biochemistry, 1989
The nucleotide ligation site of adenylylated glutamine synthetase, which contains a unique tyrosyl residue linked through a phosphodiester bond to 5'-AMP, was studied by digestion with three hydrolytic enzymes. The products on micrococcal nuclease digestion were adenosine and o-phosphotyrosyl glutamine synthetase.
Yoshio Nakano +2 more
openaire +3 more sources
The nucleotide ligation site of adenylylated glutamine synthetase, which contains a unique tyrosyl residue linked through a phosphodiester bond to 5'-AMP, was studied by digestion with three hydrolytic enzymes. The products on micrococcal nuclease digestion were adenosine and o-phosphotyrosyl glutamine synthetase.
Yoshio Nakano +2 more
openaire +3 more sources
Journal of Bacteriology, 1967
The relationships of five feedback inhibitors for the Bacillus licheniformis glutamine synthetase were investigated. The inhibitors were distinguishable by differences in their competitive relationship for the substrates of the enzyme.
E. R. Stadtman, Jerry S. Hubbard
openaire +3 more sources
The relationships of five feedback inhibitors for the Bacillus licheniformis glutamine synthetase were investigated. The inhibitors were distinguishable by differences in their competitive relationship for the substrates of the enzyme.
E. R. Stadtman, Jerry S. Hubbard
openaire +3 more sources
Glutamine synthetase and transferase
1967This enzyme (or enzymes) catalyzes the following reactions: 1. Glutamate + ATP + NH3 → glutamine + ADP + Pi (glutamine synthesis). 2. Glutamine + NH2OH →γ-glutamylhydroxamate + NH3 (glutamyl transfer reaction). 3. Glutamine + H2O → Glutamate + NH3 (arsenolysis of glutamine).
openaire +2 more sources
Regulation of Glutamine Synthetase Degradation
1981There is considerable evidence that the synthesis and degradation of proteins is a dynamic process which governs the steady-state level of enzymes in the cell. Although a great deal is known about the factors that regulate the rates of enzyme synthesis, relatively little is known about the mechanism involved in the regulation of enzyme degradation.
Earl R. Stadtman +2 more
openaire +2 more sources
Regulation of glutamine synthetase
Archives of Biochemistry and Biophysics, 1967Abstract Factors influencing subunit association in the glutamine synthetase from Escherichia coli have been studied by means of sucrose gradient sedimentation, disc gel electrophoresis, and light-scattering techniques. The native enzyme is not dissociated by treatments with 0.01 m EDTA, 1.0 m urea, mercaptan, or alkaline pH when tested ...
C.A. Woolfolk, Earl R. Stadtman
openaire +5 more sources