نتایج جستجو برای: fur
تعداد نتایج: 4267 فیلتر نتایج به سال:
Abstract This article explores the relationship between tax law and settler colonialism by looking at ways in which taxes can be part of “civilizing” process Indigenous peoples. In 1921, Territory Alaska enacted a “license on business fur-farming, trapping trading pelts skins fur-bearing animals.” Since most trappers were Natives, “fur tax” de facto targeted them. unpacks sociocultural politica...
Our whole-genome microarray studies of Neisseria meningitidis MC58 previously identified a set of 153 genes whose transcription was activated during growth in iron. In this study, Fur-mediated regulation of the iron-activated nspA gene was confirmed, whereas iron-activated regulation of the secY gene was demonstrated to be Fur independent. Analysis of the Fur binding sequences in the nspA gene ...
PURPOSE The role of the Ferric Uptake Regulator (FUR) in the acid resistance of Helicobacter pylori (H. pylori) has been thought to be independent of urease. However, we demonstrated in this study that Fur influences urease activity. MATERIALS AND METHODS A fur knockout mutant of H. pylori was constructed by replacing the Fur gene with a kanamycin resistant marker gene. The wild-type H. pylor...
Previous experiments examining the transcriptional profile of the anaerobe Desulfovibrio vulgaris demonstrated up-regulation of the Fur regulon in response to various environmental stressors. To test the involvement of Fur in the growth response and transcriptional regulation of D. vulgaris, a targeted mutagenesis procedure was used for deleting the fur gene. Growth of the resulting Deltafur mu...
The ferric uptake regulator Fur is a well-known iron-responsive repressor of gene transcription, which is used by many bacteria to respond to the low-iron environment that pathogens encounter during infection. In this study we used comparative transcriptome analysis to define the role of the Fur protein in the global control of gene transcription and iron regulation in Neisseria meningitidis. B...
die vorliegende untersuchung besteht aus drei theoretischen und praktischen teilen sowie zwei anlagen. in dem theroretischen teil wrird auf die lehrmethode hingewiesen. auberdem werden vierzehn unterschiedliche themen und die wichtigsten resultate der durchgefuhrten meinungesumfragen vorgelegt. fur den praktischen teil wurden als beispiel 14 zielgerichtete und zusammenhangende themen uber allta...
We have overexpressed and purified the Helicobacter pylori Fur protein and analyzed its interaction with the intergenic regions of divergent genes involved in iron uptake (frpB and ceuE) and oxygen radical detoxification (katA and tsaA). DNase I footprint analysis showed that Fur binds specifically to a high-affinity site overlapping the P(frpB) promoter and to low-affinity sites located upstre...
In the ancient anaerobic environment, ferrous iron (Fe(2+)) was one of the first metal cofactors. Oxygenation of the ancient world challenged bacteria to acquire the insoluble ferric iron (Fe(3+)) and later to defend against reactive oxygen species (ROS) generated by the Fenton chemistry. To acquire Fe(3+), bacteria produce low-molecular weight compounds, known as siderophores, which have extre...
es wird gezeigt, dass bei der standiger zunahme der production von roheisen ,die fast ausschliesslich in hochofen erfolgt, der gestelldurchmesser und die ofeneinheit zunimmt demgegenuber der spezifische brennstoffverbrauch abnimmt. weiterhin wird die entwicklungsrichtung der stahlerzeungsverfanren wegen der wirtschaftlichen und technischen hinsicht untersucht und festgestellt, dass nuter versch...
Homologs of the ferric uptake regulator Fur and the iron storage protein ferritin play a central role in maintaining iron homeostasis in bacteria. The gastric pathogen Helicobacter pylori contains an iron-induced prokaryotic ferritin (Pfr) which has been shown to be involved in protection against metal toxicity and a Fur homolog which has not been functionally characterized in H. pylori. Analys...
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