Results 191 to 200 of about 73,683 (226)

Response of <i>Escherichia coli</i> chemotaxis pathway to pyrimidine deoxyribonucleosides. [PDF]

Microbiol Spectr
Shah M, Xu W, Sourjik V.
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Preparation of uridine diphosphogalactose and uridine diphosphate

Analytical Biochemistry, 1964
Abstract A procedure for the production of UDP-Gal and UDP on a preparative scale has been elaborated using a bacterial mutant which accumulates UDP-Gal in the presence of galactose. This method provides several possibilities for labeling these compounds with radioactive isotopes.
A E, SHEDLOVSKY, H A, BOYE, S, BRENNER
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Phosphorylation of uridine and cytidine by uridine–cytidine kinase

Journal of Biotechnology, 2014
Uridine 5'-monophosphate (5'-UMP) and cytidine 5'-monophosphate (5'-CMP) were biosynthesized by recombinant uridine-cytidine kinase (UCK) and acetate kinase (ACK). The ack and uck genes from Escherichia coli K12 and the uck1, uck2 and ack genes from Lactobacillus bulgaricus ATCC 11842 were cloned and inserted into the plasmid pET-28a.
Yahui Qian, Qingbao Ding, Yanyu Li, Zhi Zou, Bingkun Yan, Ling Ou   +5 more
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Neuronal uridine metabolism

Acta Neurologica Scandinavica, 1992
Uridine and other nucleic acids form part of RNA, DNA, coenzymes, second messengers, etc. Uridine uptake in nerve cells is an expression of neuronal RNA synthesis. More knowledge of uridine functions in neurones may give a better understanding of mechanisms underlying dementia, and they could be useful in treating brain tumors.
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Brain uridine monophosphate: reduced incorporation of uridine during avoidance learning

Brain Research, 1974
Abstract Avoidance training produced no detectable changes in the radioactivity incorporated from [5-3H]uridine into total RNA of mouse brain, but decreased the radioactivity in brain uridine monophosphate. The chemical response was largest in the subcortical forebrain, and did not occur in yoked control mice.
D, Entingh, T, Damstra-Entingh, A, Dunn, J E, Wilson, E, Glassman   +4 more
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Uridyl Transferases and the Formation of Uridine Triphosphate: Enzymic Production of Uridine Triphosphate: Uridine Diphosphoglucose Pyrophosphorolysis

Nature, 1953
Uridyl Transferases and the Formation of Uridine Triphosphate: Enzymic Production of Uridine Triphosphate: Uridine Diphosphoglucose ...
A, MUNCH-PETERSEN, H M, KALCKAR, E, CUTOLO, E E, SMITH   +3 more
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Uridine phosphorylase and uridine kinase activities of the Ehrlich ascites carcinoma

Canadian Journal of Biochemistry, 1969
Uridine phosphorylase and uridine kinase in cell-free extracts of the Ehrlich ascites carcinoma were assayed by a radioactive-tracer technique. Under the assay conditions uridine phosphorylase had an optimum pH of 8.0 and an apparent Km value for uridine of 2.5 × 10−3 M.
Rainnie, D J, Blair, D G
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Uridine Kinase: Altered Enzyme with Decreased Affinities for Uridine and CTP

Archives of Biochemistry and Biophysics, 1998
Uridine kinase is the rate-limiting enzyme in the salvage pathway for uridine or cytidine of mammalian cells. Alignment of the uridine kinase sequence with other nucleoside and nucleotide kinases supports a common ancestor for all of these. Three polypeptide segments for the ATP site and three polypeptide segments for the acceptor nucleoside site have ...
P A, Ropp, T W, Traut
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Ein neuer Weg zu 3′‐Desoxy‐uridin aus Uridin

Chemische Berichte, 1968
AbstractDie Darstellung von 3′‐Desoxy‐uridin (3) aus Uridin über 1 und 2 wird beschrieben. 3 ist gegenüber saurer Hydrolyse relativ stabil. 3 hemmt in vitro weder die DNS‐ noch die RNS‐Synthese von Ehrlich‐Ascites‐Tumorzellen. Die Verbindung vermag Nucleosid‐Phosphorylasen nicht zu hemmen und wird durch diese Enzyme nicht gespalten.
Gotthard Kowollik, Peter Langen
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Feedback onhibition of uridine kinase by cytidine triphosphate and uridine triphosphate

Biochimica et Biophysica Acta (BBA) - Specialized Section on Nucleic Acids and Related Subjects, 1964
Abstract Uridine kinase was found to be the rate-limiting step in the anabolism of uridine to its successive nucleotide derivatives. This enzymatic activity was susceptible to feedback inhibition by the pyrimidine nucleoside triphosphate end-products; effective inhibition was exerted by UTP and even more strikingly by CTP.
E P, ANDERSON, R W, BROCKMAN
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