نتایج جستجو برای: bacteria transport
تعداد نتایج: 448588 فیلتر نتایج به سال:
BACKGROUND For some lactic acid bacteria higher biomass production as a result of aerobic respiration has been reported upon supplementation with heme and menaquinone. In this report, we have studied a large number of species among lactic acid bacteria for the existence of this trait. RESULTS Heme- (and menaquinone) stimulated aerobic growth was observed for several species and genera of lact...
A general strategy for the expression of bacterial membrane transport and receptor genes in Escherichia coli is described. Expression is amplified so that the encoded proteins comprise 5-35% of E. coli inner membrane protein. Depending upon their topology, proteins are produced with RGSH6 or a Strep tag at the C-terminus. These enable purification in mg quantities for crystallization and NMR st...
Shocked cells have been examined with respect to their sensitivity to inhibitors of active transport.’ They behave similarly to unshocked cells except that their transport ability is reduced. The process of restoration of active transport has been studied. Metabolic energy appears to be necessary to restore the uptake ability of shocked cells. Evidence is presented which suggests that the galac...
Agrobacterium radiobacter NCIB 11883 was grown in lactose-limited continuous culture at a dilution rate of 0.045/h. Washed cells transported [14C]lactose and [methyl-14C]beta-D-thiogalactoside, a nonmetabolisable analog of lactose, at similar rates and with similar affinities (Km for transport, less than 1 microM). Transport was inhibited to various extents by the uncoupling agent carbonyl cyan...
Mutants of Salmonella fyjhimurium classified by n&itional and enzymatic tests as transport-negative for sulfate are capable of combining with small amounts of this anion (up to lo4 molecules per bacterium). The following results support the suggestion that the bacteria possess highly specific sulfate binding sites near the cell surface. 1. Under growth conditions sulfate combines with the bacte...
Managed aquifer recharge through bank filtration is an important method to produce sustainable drinking water. Yet, water quality related transport of pathogens (bacteria and viruses) into groundwater systems from surface waters can be a matter concern, especially in urbanized regions. Based on 1-year monitoring campaign, reactive model was developed for bacteria at riverbank site located Germa...
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