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Stran 1 iz 83 rezultatov
EFFECT OF TRITIATED THYMIDINE ON THE MORPHOGENESIS OF LATERAL ROOTS IN ZEA MAYS.
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Properties of uridine and thymidine phosphorylating enzymes of Zea mays.
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Histone acetylation in Zea mays. II. Biological significance of post-translational histone acetylation during embryo germination.
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Multiple forms of histone acetyltransferases and histone deacetylases, which have been separated and characterized in the accompanying manuscript (López-Rodas, G., Georgieva, E. I., Sendra, R., and Loidl, P. (1991) J. Biol. Chem. 266, 18745-18750), together with in vivo acetate incorporation, were
The duration of DNA synthetic (S) period in Zea mays: A genetic control.
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The nuclear cycle among several diverse genetic stocks of Zea mays root meristem cells was compared and it was found that there were no significant differences among the nuclear cycle durations and its component phases. The durations of various periods of their mitotic cycles were studied by
Cytological study on water stress during germination of Zea mays.
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Kernels of Zea mays were subjected to dehydration treatment at various times during germination. Embryos from kernels dehydrated during the first 36 h of germination are resistant to dehydration and subsequently germinate earlier than controls. Dehydration of kernels germinated during 72h leads to
The time course of liver injury and [3H]thymidine incorporation in chlordecone-potentiated CHCl3 hepatotoxicity.
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The mechanism by which chlordecone (CD) potentiates CHCl3 hepatotoxicity and lethality remains unknown. We examined the time course of the hepatotoxicity by following serum enzymes, liver histopathology, hepatocellular regeneration, and tissue repair by morphometric analysis and [3H]thymidine (3H-T)
Functional cis-element sequence requirements for suppression of gene expression by the TNPA protein of the Zea mays transposon En/Spm.
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TNPA, one of the two transposition proteins encoded by the En/Spm transposable elements of Zea mays, suppresses the expression of genes that contain an appropriate cis element. Suppression can be monitored in tobacco protoplasts in a transient expression assay as follows. The plant promoter-driven
Ornithine decarboxylase and thymidine kinase activities and polyamine levels from selected organs of adult miniature swine receiving three concentrations of dietary menhaden oil.
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Mature, female swine were randomly assigned to one of seven dietary groups. Swine in groups 1-3 were fed a cholesterol-rich diet for 55 days while the remaining groups remained on a basal swine diet. At the end of the cholesterol(Chol)-preloading period the swine in groups 1-7 were placed on
9-(4-Hydroxybutyl)-N2-phenylguanine (HBPG), a thymidine kinase inhibitor, suppresses herpes virus reactivation in mice.
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In cells of the nervous system, which have little or no cellular thymidine kinase, the pharmacologic inhibition of viral thymidine kinase may prevent the reactivation of herpes virus, which requires phosphorylated thymidine for replication. We tested a newly synthesized inhibitor of viral thymidine
The effect of omega-6 and omega-3 fatty acids on 3H-thymidine incorporation in hepatoma 7288CTC perfused in situ.
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Ingestion of diets containing corn oil or marine fish oils is known to increase or decrease, respectively, the growth of transplantable rodent tumours. The active agents in these oils have been identified as linoleic acid (in corn oil) and omega-3 fatty acids (in marine oils), but it is still not
Effect of 9-(4-hydroxybutyl)-N2-phenylguanine (HBPG), a thymidine kinase inhibitor, on clinical recurrences of ocular herpetic keratitis in squirrel monkeys.
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9-(4-Hydroxybutyl)-N2-phenylguanine (HBPG) is a new viral thymidine kinase inhibitor that we tested for the ability to prevent recurrences of herpetic keratitis. Eighteen squirrel monkeys (Saimiri scuireus) were infected in both corneas with the Rodanus strain of herpes simplex virus type 1 (HSV-1).
A negative image of the quiescent centre in regenerating root apices of Zea mays.
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Usually the presence of the quiescent centre in roots is demonstrated by the absence of labelled nuclei following treatment of the root with appropriate radioactive markers. By modification of the pulselabelling technique, a "negative" image of the quiescent center, showing more intense labelling
The effect of ethylene on root meristems of Pisum sativum and Zea mays.
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Ethylene at a concentration of 100 μl l(-1) causes a slight increase in the duration of the mitotic cycle in the primary root meristems of both Pisum sativum L. and Zea mays L. This is due to a lengthening of the G 1 phase; other phases of the cycle are unaffected. Autoradiography and
Wheat bran and corn oil do not influence proliferation in the colon of healthy rats when energy intakes are equivalent.
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Dietary intakes of fiber (wheat bran) and fat (corn oil) by rats were quantitatively varied for 6 wk while intakes of energy and essential nutrients were constant among the diets. The influence of wheat bran and corn oil levels on colonic epithelial cell proliferation was assessed using
Maize Thymidine Kinase Activity Is Present throughout Plant Development and Its Heterologous Expression Confers Tolerance to an Organellar DNA-Damaging Agent
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Thymidine kinase 1 (TK1) phosphorylates thymidine nucleosides to generate thymidine monophosphate. This reaction belongs to the pyrimidine salvage route that is phylogenetically conserved. In the model plant Arabidopsis thaliana, TK activity contributes to maintain nuclear and organellar
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