Results 251 to 260 of about 492,866 (322)

Entamoeba histolytica: nucleic acid precursors affecting axenic growth.

Experimental Parasitology, 1980
Abstract Treatment of Panmede and Trypticase, in water, with activated carbon and subsequently combining the filtered solution with glucose, cysteine, salts, serum and vitamins results in a medium depleted in the nucleic acid precursors required to sustain a high level of growth of axenic Entamoeba histolytica.
Richard E. Reeves, B. West
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Independent blood-brain barrier transport systems for nucleic acid precursors.

Biochimica et Biophysica Acta (BBA) - Biomembranes, 1975
The blood-brain barrier permeability to certain 14-C-labelled purine and pyrimidine compounds was studied by simultaneous injection in conjunction with two reference isotopes into the rat common carotid artery and decapitation 15s later. The amount of 14-C-labelled base or nucleoside remaining in brain was expressed in relation to 3-H2O (a highly ...
E. Cornford, W. Oldendorf
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Metabolism of caffeine to nucleic acid precursors in mammalian cells.

Mutation Research/Fundamental and Molecular Mechanisms of Mutagenesis, 1976
Caffeine is rapidly metabolized in human and mouse cells in culture by de-methylation: within 1-3 h of exposure to millimolar concentrations of labeled caffeine, more than 90% of the pool consists of labeled products of metabolism and less than 10% is still caffeine. The methyl groups seem to be transferred and used in the de novo synthesis of thymine,
R. Goth, J. Cleaver
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The role of the membrane in the utilization of nucleic acid precursors.

CRC Critical Reviews in Biochemistry, 1974
(1974). The Role of the Membrane in the Utilization of Nucleic Acid Precursor. CRC Critical Reviews in Biochemistry: Vol. 2, No. 2, pp. 259-310.
J. Hochstadt
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Uptake of tritiated nucleic acid precursors by Babesia bovis in vitro.

International Journal for Parasitology, 1986
Abstract Uptake of tritiated nucleic acid precursors by Babesia bovis in vitro. International Journal for Parasitology 16 : 263–268. The uptake of tritiated nucleic aid precursors in vitro by two Babesia bovis isolates, from Mexico and South Africa, was compared using a semiautomated microdilution method.
P. Conrad
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Inhibition of lettuce seed germination and seedling growth by antimetabolites of nucleic acids, and reversal by nucleic acid precursors and gibberellic acid

Planta, 1966
Germination of White Paris lettuce seeds is inhibited by 2-thiouracil up to 24 hours. This inhibition is reversed by RNA precursors only. Seedling growth of lettuce is inhibited by 2-thiouracil and 5-fluorouracil; and white the effect of 2-thiouracil is counteracted by RNA precursors, inhibition due to 5-fluorouracil is not reversed significantly by ...
A. Khan
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Requirements ofAcholeplasma laidlawii A, strain LA 1, for nucleic acid precursors

Folia Microbiologica, 2008
The requirements for nucleic acid precursors byAcholeplasma laidlawii type A, strain LA 1, were studied. The absence of a requirement for ribose or deoxyribose and the interconvertibility of uridine and cytidine contrasts with previously reported results with strain pG 8.
B. Liska, P. F. Smith
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