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Advances in biochemical psychopharmacology, 1977
The existence of nonadrenergic, noncholinergic nerve components in the autonomic nervous system is now well established. They are strongly represented in the gastrointestinal tract of all vertebrates and have been identified in a variety of other organs, including lung, trachea, bladder, esophagus, eye, seminal vesicles, and possibly parts of the ...
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The existence of nonadrenergic, noncholinergic nerve components in the autonomic nervous system is now well established. They are strongly represented in the gastrointestinal tract of all vertebrates and have been identified in a variety of other organs, including lung, trachea, bladder, esophagus, eye, seminal vesicles, and possibly parts of the ...
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Degradation of Purine Nucleotides
1978Purine nucleotides have a vital role in metabolism. Therefore, the maintenance of a constant nucleotide composition of the cell is essential for normal function. Purine nucleotides are synthesized by purine biosynthesis de novo, by salvage pathways and nucleoside kinases, and by degradation of nucleic acids.
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Patterns of purine nucleotides in fish erythrocytes
Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 19791. The purine nucleotides were determined in the whole blood of 9 fresh water teleosts and 2 marine selachians. 2. GTP and ATP accounted for 88-99% of the total erythrocytes purines. 3. The ATP/ADP ratio ranged from 11 to 60 in the erythrocytes of the fish examined. 4.
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Purine Nucleotide Interconversions
1978The various reactions of purine ribonucleotide synthesis result in the formation of adenylate, inosinate, and guanylate; xanthylate may also be formed, but this seems to be a quantitatively minor process in most mammalian cells. These purine ribonucleoside monophosphates can be metabolized in several different ways; these processes can in general be ...
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Activation of aspartate transcarbamoylase by purine nucleotides
Biochimica et Biophysica Acta (BBA) - Enzymology, 1970Abstract 1. 1. A previous report demonstrated an increase in aspartate transcarbamoylase activity (carbamoylphosphate: l -aspartate carbamoyltransferase, EC 2.1.3.2) upon incubation of an homogenate of Escherichia coli with ATP, GTP, phosphoenolpyruvate, amino acids and magnesium acetate.
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Studies of the Regulation of Purine Nucleotide Catabolism
Canadian Journal of Biochemistry, 1975Ehrlich ascites tumor cells containing radioactive ATP were incubated in vitro with a range of concentrations of 2-deoxyglucose in order to produce different rates of ATP catabolism. Concentrations of all radioactive products of ATP catabolism were measured, and apparent rates of adenylate deaminase and inosinate dehydrogenase and of adenylate and ...
C A, Lomax, A S, Bagnara, J F, Henderson
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Purine nucleotides as regulators of vessel tone
Biochemical Society Transactions, 19885‘-isobutylthioadenosine, but it was inhibited by 10 mMp-nitrophenylphsphate to 50 k 11% ( n = 6). The inhibition of the pigeon ventricle AMPase by other nucleoside monophosphates (with specificity for the base moeity), but not by ribose phosphate or B-glycerophosphate, indicates the presence of a 5’-nucleotidase.
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Biosynthesis of Purine Nucleotides and Methylated Purines in Higher Plants
Drug Metabolism Reviews, 1977Takeo Suzuki, Eiichi Takahashi
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Purine Nucleotide Restoration in HPRT- Cells
1989Lesch-Nyhan syndrome is caused by a deficiency of the enzyme hypoxanthine-guanine phosphoribosyltransferase (HPRT) (1, 2). This enzyme catalyzes the conversion of the purine bases hypoxanthine and guanine to their respective 5′ribo-nucleotides. It is reasonable to assume that a deficiency of HPRT would cause a decrease in the cellular concentrations of
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