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Página 1 a partir de 240 resultados
Polymerase recognition of synthetic oligodeoxyribonucleotides incorporating degenerate pyrimidine and purine bases.
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A universal base that is capable of substituting for any of the four natural bases in DNA would be of great utility in both mutagenesis and recombinant DNA experiments. This paper describes the properties of oligonucleotides incorporating two degenerate bases, the pyrimidine base
The association between early neurological deterioration and whole blood purine concentration during acute stroke.
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The purine nucleosides adenosine and guanosine delay axonal degeneration in vitro.
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Axonal degeneration is a key component of many neurodegenerative diseases. Injured axons undergo a program of self-destruction termed Wallerian degeneration that is an active, well-regulated process. The pathways leading to axon fragmentation are uncharacterized, but experiments with wld(s) mutant
A Plasma Metabolomic Signature Involving Purine Metabolism in Human Optic Atrophy 1 (OPA1)-Related Disorders.
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Dominant optic atrophy (DOA; MIM [Mendelian Inheritance in Man] 165500), resulting in retinal ganglion cell degeneration, is mainly caused by mutations in the optic atrophy 1 (OPA1) gene, which encodes a dynamin guanosine triphosphate (GTP)ase involved in mitochondrial membrane processing. This work
THE RELATION OF FATTY DEGENERATION TO THE OXIDATION OF PURINES BY LIVER CELLS.
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These experiments show that it is possible to cause, by the proper use of hydrazine and phosphorus, a very high degree of fatty change in the liver with a minimum of necrosis, involving alike both peripheral and central portions of the lobule and thus eliminating the " factor of safety" or residual
Role of G protein-coupled receptors (GPCRs) for purines and pyrimidines in mediating degeneration and regeneration under neuroinflammatory processes.
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[Metabolism of purine bodies in infant toxicosis and atrophy].
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[Purine metabolism in toxicosis and atrophy of infants].
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Reducing the number of microlocations in oligonucleotide microchip matrices by the application of degenerate oligonucleotides.
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The application of degenerate oligonucleotides to DNA Sequencing by Hybridisation with Oligonucleotide Matrix (SHOM) is proposed. The use of degenerate oligonucleotides is regarded as an example of pooling methods that are suitable for various laboratory procedures requiring numerous samples to be
Structural mechanisms of the degenerate sequence recognition by Bse634I restriction endonuclease.
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Restriction endonuclease Bse634I recognizes and cleaves the degenerate DNA sequence 5'-R/CCGGY-3' (R stands for A or G; Y for T or C, '/' indicates a cleavage position). Here, we report the crystal structures of the Bse634I R226A mutant complexed with cognate oligoduplexes containing ACCGGT and
[Changes in the blood uric acid levels in patients with retinitis pigmentosa and in rats with hereditary retinal degeneration].
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The content of uric acid was measured in the blood of patients suffering from retinitis pigmentosa, as well as in the blood, retina, brain, liver and urine of rats with inherited retinal degeneration in the course of postnatal development. It was found that in the patients with retinitis pigmentosa,
OBP100 binds remarkably degenerate octamer motifs through specific interactions with flanking sequences.
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We have used the 100-kD HeLa cell octamer-binding protein OBP100 as a model to study flexible DNA sequence recognition by promoter-binding proteins. OBP100 binds to the conserved octamer motif ATGCAAAT found in numerous promoters and additionally to two degenerate octamer motifs (sites I and II)
A synergistic effect of phosphate, pH and Phe159 substitution on the formycin A association to the E. coli purine nucleoside phosphorylase.
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A steady-state absorption and emission spectroscopy was used to create a comprehensive work and to study the interaction of the wild type Escherichia coli purine nucleoside phosphorylase and its mutants, PNPF159Y and PNPF159A, with a potent E. coli PNP inhibitor - formycin A. The absorption and
Restriction enzyme BsoBI-DNA complex: a tunnel for recognition of degenerate DNA sequences and potential histidine catalysis.
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BACKGROUND
Restriction endonucleases form a diverse family of proteins with substantial variation in sequence, structure, and interaction with recognition site DNA. BsoBI is a thermophilic restriction endonuclease that exhibits both base-specific and degenerate recognition within the sequence
Purine metabolism in sprint- vs endurance-trained athletes aged 20‒90 years.
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Purine metabolism is crucial for efficient ATP resynthesis during exercise. The aim of this study was to assess the effect of lifelong exercise training on blood purine metabolites in ageing humans at rest and after exhausting exercise. Plasma concentrations of hypoxanthine (Hx), xanthine (X), uric
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