Results 151 to 160 of about 79,534 (186)
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Biopolymers, 1971
AbstractThe large change in the electronic absorption spectrum of cytidine on going from an aqueous to an aprotic medium is attributed to the existence of a hydrogen bonded solvent‐solute complex in solvents capable of donating a proton. The spectrum of cytidine in a variety of solvents and the spectra of a number of nontautomerising model compounds ...
W C, Johnson, P M, Vipond, J C, Girod
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AbstractThe large change in the electronic absorption spectrum of cytidine on going from an aqueous to an aprotic medium is attributed to the existence of a hydrogen bonded solvent‐solute complex in solvents capable of donating a proton. The spectrum of cytidine in a variety of solvents and the spectra of a number of nontautomerising model compounds ...
W C, Johnson, P M, Vipond, J C, Girod
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Journal of Molecular Biology, 1972
Abstract Between 15 and 30 °C, conversion of cytidine to the 2′, 3′- or 5′-phosphate increases the reactivity towards methoxyamine by twofold or less in both addition to the double bond at C-6 and substitution of the amino group at C-4. With dinucleoside monophosphates, addition is slower than with cytidine 2′(3′) phosphate and is usually slower than
A, Steinschneider, B, Leshem
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Abstract Between 15 and 30 °C, conversion of cytidine to the 2′, 3′- or 5′-phosphate increases the reactivity towards methoxyamine by twofold or less in both addition to the double bond at C-6 and substitution of the amino group at C-4. With dinucleoside monophosphates, addition is slower than with cytidine 2′(3′) phosphate and is usually slower than
A, Steinschneider, B, Leshem
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Phosphorylation of uridine and cytidine by uridine–cytidine kinase
Journal of Biotechnology, 2014Uridine 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 +5 more
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Activation-induced cytidine deaminase and active cytidine demethylation
Trends in Biochemical Sciences, 2015The regulation of demethylation in vertebrates has begun to be elucidated in the past decade. However, a possible involvement of activation-induced cytidine deaminase (AID) in this process remains uncertain. We survey the data supporting or casting doubt on such a role, and propose that there is no strong evidence for an involvement of AID in genome ...
Almudena R, Ramiro, Vasco M, Barreto
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Cytidine Deaminase from Human Spleen
1989No abstract ...
VITA, Alberto +4 more
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Nature, 1949
A STUDY of the crystal structure of cytidine is being carried out by X-ray analysis. The crystal specimens were kindly supplied by Dr. D. O. Jordan, University of Nottingham, and were found to be orthorhombic with {110} dominating. An optical investigation shows that the sign is positive, with α∥c, β∥b and γ∥a Cell dimensions are : a = 13·93 A., b = 14·
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A STUDY of the crystal structure of cytidine is being carried out by X-ray analysis. The crystal specimens were kindly supplied by Dr. D. O. Jordan, University of Nottingham, and were found to be orthorhombic with {110} dominating. An optical investigation shows that the sign is positive, with α∥c, β∥b and γ∥a Cell dimensions are : a = 13·93 A., b = 14·
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Cytidine Deaminase in Human Lymphocytes
Nature New Biology, 1973PERIPHERAL blood lymphocytes in culture undergo cell division in the presence of the mitogenic stimulant phyto-haemagglutinin (PHA)1. Some of the metabolic processes that occur shortly after stimulation include phosphorylation of membrane bound phosphatidyl inositol2, acetylation of histones3, changes in cyclic GMP levels4, a pronounced elevation of ...
C W, Abell, N W, Marchand
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Solvolyses of Cytosine and Cytidine
Journal of Pharmaceutical Sciences, 1972It has been confirmed by UV spectrophotometry and TLC that cytosine and cytidine deaminate to uracil and uridine, respectively, at all pH values. These products slowly degrade further in strongly alkaline solutions. Cytidine also undergoes a parallel degradation in strongly alkaline solutions to a nonchromophoric compound, which can be assigned to a ...
E R, Garrett, J, Tsau
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Prebiotic Formation of Cytidine Nucleotides
Nature, 1971IN contrast to the plausible explanations for proteinoid formation1, there seems to be no satisfactory concept for the genesis of polynucleotide templates in the presumed conditions of the primitive Earth. Only parts of the problem, such as the origin of the bases2,3 and carbohydrates4 and the synthesis of short oligonucleotides5,6, have been subjected
C M, Tapiero, J, Nagyvary
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Some dihydro-cytidines and -isocytidines
J. Chem. Soc., Perkin Trans. 1, 1974Syntheses of 5,6-dihydrocytidine (IV), 5,6-dihydroisocytidine (V), and the 2-thioanalogue (VII) of the former are described. U.v. spectroscopic data for (V) and its 2-N-methyl and 2,2-di-N-methyl derivatives (IX) and (X) in alcoholic solution reveal amino rather than imino tautomeric states. The n.m.r.
V, Skarić +3 more
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