lost on the moon team activity
Báo cáo khoa học: Alizarine derivatives as new dual inhibitors of the HIV-1 reverse transcriptase-associated DNA polymerase and RNase H activities effective also on the RNase H activity of non-nucleoside resistant reverse transcriptases pot
... inhibition potency on the polymerase function; and (c) the K-61 analogueshowed a fourfold reduction in its RDDP activity inhi-bition potency. By contrast, when the AQ derivativeswere tested on the ... similar conformation (RMS 0.57), on the other hand, in the crystal reported by Pata et al. [30] the NNRTI binding pocket most closely resembles the RT unliganded conformation. Therefore, the AQ ... steric modifications occur. The binding modeof K-49 in the Y181C RT is different, and the contribu-tion of the p–p stacking interaction is lost. Furthermore, the low number of good contacts with...
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Tài liệu The Influence of Human Activity on the Environment ppt
... rise.• This leads to disruption of the weather patterns eg drought, floods• Some weeds may thrive on the extra carbon dioxide while other plants are killedBiological Control of Pests• This means ... from the water• This means the fish suffocate and die• This process is called Eutrophication• Raw sewage pumped into rivers has the same effect The Influence of Human Activity on the EnvironmentBenefits ... cars and power stations produces carbon dioxide, sulphur dioxide and other greenhouse gases• carbon dioxide traps heat in the atmosphere and causes the temperature of the earth to rise.•...
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Tài liệu Báo cáo khóa học: The effect of mutations surrounding and within the active site on the catalytic activity of ricin A chain pptx
... proposed for the binding of the SRL to the active site of RTA in which the principal difference lies in the conformation of the second ÔGÕ in the target GAGA motifin the 28S rRNA substrate. In one model, ... of RTA resulted in different effects on the activity of RTA. Whereas, one had no effect on the activity of the enzyme (R258A), others reduced activity by one(R213A, R258D, R48A) or by two (R213D) ... hydrogen bonds to be formed between the base G4and the sidechain of Asn122. In the second model(Fig. 1B) the structure of the hexanucelotide is, on the whole, unchanged and the majority of the interactions...
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Tài liệu Báo cáo khoa học: Coordination chemistry of iron(III)±porphyrin±antibody complexes In¯uence on the peroxidase activity of the axial coordination of an imidazole on the iron atom ppt
... to the iron(III) of Fe(ToCPP)and Fe(ToCPP))13G10 The second part of our results concerns the binding ofimidazole d erivatives on the iron of Fe(ToCPP) either alonein solution or inside the ... thisinhibition was due to the binding of the imidazole ligand on the iron atom. In addition, measurement of the kineticparameters for the oxidation of ABTS by H2O2catalyzed byFe(ToCPP))13G10 in the ... (Table 1). The bind-ing of the ®rst CN±ligand to the iron was thus more easy in the hydrophobic binding pocket of the antibody than the binding of the second one, most probably because of the steric...
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Báo cáo khoa học: Effect of annealing time of an ice crystal on the activity of type III antifreeze protein pdf
... that the TH valuereflects the fraction of ice-bound AFPs on the flat iceplane. Indeed, TH increases in proportion with the total concentration of nfeAFP8, as can be seen inFig. 3A. The fraction ... AFP based on the ‘adsorption–inhibition’ model [3,4]. (A) Aconvex ice front is created after primarybinding of type III AFP onto the flat iceplane. (B) Overgrowth of the convex icefront, giving ... value. (C) Possiblesecondary ice binding of type III AFP onto the convex ice front during the annealingperiod (2–3 h). (D) AFPs bound onto the convex ice front narrow the growth area(dashed...
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Báo cáo khoa học: The potent inhibitory activity of histone H1.2 C-terminal fragments on furin doc
... cloned through the flanking NcoI and XhoI restrictionsites into the expression vector pET28a. The sequences of the constructions were verified by DNA sequencing. The primer pairs for the cloning ... column, the highest inhibi-tory activity was found in the unbound fraction (datanot shown). The unbound fraction was then furtherpurified on a Superdex-75 column (Fig. 2A) and then on a Hamilton ... fractionswere finally obtained and assayed for their inhibitory activity. Among them, the major fractions P2, P3 andP4 have a strong inhibitory activity against furin. The homogeneity of the three...
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Báo cáo khoa học: Effect of heliquinomycin on the activity of human minichromosome maintenance 4/6/7 helicase pdf
... both the ini-tiation and elongation of DNA replication [13], andthese proteins migrate on the genome together with the replication forks [14,15]. One of the intricacies relatedto the function ... solution (0.4 lL) containing or lackingheliquinomycin was added to the reaction mixture. The final con-centrations of heliquinomycin added to the reaction mixture areindicated at the top. The ... DNA was considered to be100% in the control reaction mixture lacking heliquinomycin, and the proportions in the mixtures containing heliquinomycin were cal-culated in relation to the control...
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Báo cáo khoa học: Effect of magnesium ions on the activity of the cytosolic NADH/cytochrome c electron transport system pptx
... Fig. 1 on the oxidation of exo-genous NADH as the expression of the activity of the complete system.Discussion The data presented provide new insights into the roleof magnesium ions in the permeability ... provides direct evidence that, inthese latter conditions, the addition of magnesiummimics the results obtained with the addition ofcyto-c, the only difference being that the potentialis lower and ... mitochondria, activates the oxida-tion of extramitochondrial NADH and the generation of a membranepotential, both linked to the activity of the cytosolic NADH/cyto-c electrontransport pathway. The...
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Báo cáo khoa học: The ‘pair of sugar tongs’ site on the non-catalytic domain C of barley a-amylase participates in substrate binding and activity potx
... agreement with the reduced DMA of the AMY1 Y380A ‘sugar tongs’mutant, these effects may stem from allosteric regula-tion. The mutational analysis of the ‘sugar tongs’ in barleyAMY1 explored the role ... Thisis the first demonstration of a function for a C domainfrom the large GH clan-H. The work contributes to the unraveling of the molecular basis of multivalentenzyme–polysaccharide interactions. ... connects b5 and a5 of the catalytic (b ⁄ a)8-barrelat the end of the aglycon-binding area of the active sitecleft. Earlier, significant deviation was found in thisregion between the backbone...
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Báo cáo khoa học: On the mechanisms of bananin activity against severe acute respiratory syndrome coronavirus pptx
... molecularinterface in the case of the former helicase. Further-more, the absence of the S259 OH group in the mutated viral enzyme prevents the formation of onehydrogen bond with bananin, accounting for the reduced ... accession number AY304495) on fetal rhesusmonkey kidney cell line FRhK-4 in the presence ofhigh concentrations of this adamantine derivative. The half maximal effective concentration of bananin on these ... protein, only second-ary structure predictions can be obtained, limiting adetailed structural interpretation of the functional rolesof A68V and R124W mutations. blast analysis on the 19 complete...
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Báo cáo khoa học: UMP kinase from the Gram-positive bacterium Bacillus subtilis is strongly dependent on GTP for optimal activity potx
... region is implied in allosteric regulation [9,38].Further experimental validation will be necessary to verifythese hypotheses. The present model gathers the sequence stretches that arewell conserved ... the binding ofGTP and UTP, result primarily from interactions at the level of the heterocycle.Whatever the mechanism of activation may be underin vitro conditions, a question arises: can the ... activation. UTP antagonized the activation by GTP (Fig. 4B). In the absence of GTP,UTP decreased the reaction rate with an I50of approxi-mately 60 lM, where I50represents the concentration...
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Báo cáo khoa học: Effects of a tryptophanyl substitution on the structure and antimicrobial activity of C-terminally truncated gaegurin 4 doc
... tryptophanyl substitution at position 16 on the biological activity was confirmed for the native GGN4.Consistent with the results of the C-terminally truncatedGGN4, the D16W substitution in the native GGN4 ... contrast,neither the D16F nor K15W substitution of the D24)37GGN4 allowed such a dramatic recovery of activity. Inaddition, the D16W substitution of the native GGN4significantly enhanced the ... that the D16W substitution of D24)37GGN4 contributed to the restoration of the antimicrobial activity, at least by changing its structure.In order to elucidate the structure-function relationshipof...
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