نتایج جستجو برای: outer membrane proteins
تعداد نتایج: 883530 فیلتر نتایج به سال:
Background: Outer membrane proteins (OMPs) constitute the main structure and about half of the cell wall of Gram-negative bacteria. The OMPs of Escherichia coli (E. coli) play an important role in its drug resistance. Previous studies have shown that the OMPs of E. coli enhance its pathogenic effects by helping the bacterium to evade the immune defense and promote its adsorption to host cells. ...
Leader peptidase cleaves the amino-terminal leader sequences of many secreted and membrane proteins. We have examined the function of leader peptidase by constructing an Escherichia coli strain where its synthesis is controlled by the arabinose B promoter. This strain requires arabinose for growth. When the synthesis of leader peptidase is repressed, protein precursors accumulate, including the...
Differential analysis of outer membrane composition of S. Enteritidis strains, resistant to 50% normal human serum (NHS) was performed in order to find factors influencing the resistance to higher concentrations of NHS. Ten S. Enteritidis clinical strains, resistant to 50% NHS, all producing very long lipopolysaccharide, were subjected to the challenge of 75% NHS. Five extreme strains: two resi...
سابقه و هدف: کلامیدیا تراکوماتیس یک باکتری داخل سلولی اجباری با اهمیت کلینیکی بالا میباشد که عفونتهای انسانی ناشی از این باکتری ترجیحاً چشمها و دستگاه تناسلی را گرفتار میکنند. کلامیدیا تراکوماتیس، شایعترین عامل کونژنکتیویت فولیکولار مزمن و عامل 20 درصد موارد کونژنکتیویت حاد می باشد. از آنجاییکه تشخیص سریع می تواند در کاهش عوارض طولانی مدت بیماری موثر باشد در این تحقیق ما بر آن شدیم که روشهای مخ...
Ferric iron is transported into Escherichia coli by a number of chelating compounds. Iron transport through the outer membrane by citrate, ferrichrome, enterobactin, aerobactin, yersiniabactin, and heme is catalyzed by highly specific proteins and across the cytoplasmic membrane by ABC transport systems with lower specificity. Transport across the outer membrane requires energy, which is provid...
asymmetric membranes are widely used in many industrial membrane separation processes. the major advantage of membrane filtration over the conventional process is its ability to remove a wider spectrum of particles without using any chemicals. hollow fiber configuration offer many advantages over flat-sheet or tubular membranes. the spinning process of hollow fiber may look simple, yet it is te...
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