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Erster Ringversuch zur Bestimmung der Konzentrationen von L-trijodthyronin (T3) und L-Thyroxin (T4) im Serum [PDF]
, 1976 Horn, K. +2 more
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Symmetric Nucleosides as Potent Purine Nucleoside Phosphorylase Inhibitors.
Journal of Physical Chemistry B, 2021Nucleic acids are one of the most enigmatic biomolecules crucial to several biological processes. Nucleic acid-protein interactions are vital for the coordinated and controlled functioning of a cell, leading to the design of several nucleoside/nucleotide
Pradeep Pant, A. Pathak, B. Jayaram
semanticscholar +1 more source
Mutations in purine nucleoside phosphorylase deficiency
Human Mutation, 1997Purine nucleoside phosphorylase deficiency is an inherited disease of purine metabolism characterized clinically as combined immunodeficiency. The molecular defects have been published for 4 different alleles in 3 patients. We report four new mutations including two amino acid substitutions, A174P and G190V, a single codon deletion, delta I129, and a ...
Harold R. Collard +9 more
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Purine nucleoside phosphorylase of chicken liver
Biochimica et Biophysica Acta (BBA) - Enzymology, 1971Abstract Purine nucleoside phosphorylase (purine nucleoside:orthophosphate ribosyltransferase, EC 2.4.2.1) has been purified 125-fold from the homogenate of chicken livers and some of the properties of the purified enzyme have been studied. This enzyme had a pH optimum at around 6.o. At high substrate levels of inosine the reaction rate was increased,
Keizo Tsushima +2 more
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Characterization of purine nucleoside phosphorylase in leukemia
American Journal of Hematology, 1986AbstractPurine nucleoside phosphorylase (PNP) activity was determined in mononuclear cells from 49 patients with various types of leukemia. A low level of PNP activity was found in mononuclear cells from patients with acute myeloid and lymphoblastic leukemia and with chronic lymphocytic leukemia. Enzymatic and immunological studies on PNP from leukemic
Naomi Horiuchi +3 more
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Adenine as Substrate for Purine Nucleoside Phosphorylase
Canadian Journal of Biochemistry, 1971Purine nucleoside phosphorylase (purine-nucleoside:orthophosphate ribosyltransferase, EC 2.4.2.1) from four sources (rat liver and brain, human erythrocytes, and calf spleen) has been shown to exhibit a low intrinsic activity towards adenine in the presence of ribose 1-phosphate.
R. P. Miech +3 more
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Allosteric regulation of purine nucleoside phosphorylase
Archives of Biochemistry and Biophysics, 1991Purine nucleoside phosphorylase (EC 2.4.2.1) from bovine spleen is allosterically regulated. With the substrate inosine the enzyme displayed complex kinetics: positive cooperativity vs inosine when this substrate was close to physiological concentrations, negative cooperativity at inosine concentrations greater than 60 microM, and substrate inhibition ...
Patricia A. Ropp, Thomas W. Traut
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Stroke in purine nucleoside phosphorylase deficiency
Pediatric Neurology, 1995The first documented case of cerebrovascular disease occurring in a 13-year-old girl with purine nucleoside phosphorylase deficiency is reported. This patient, the oldest known survivor with purine nucleoside phosphorylase deficiency, had previously experienced multiple sequential neurologic problems.
David A. Tam, Robert T. Leshner
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