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Báo cáo khoa học: pH dependence, substrate specificity and inhibition of human kynurenine aminotransferase I ppt

Báo cáo khoa học: pH dependence, substrate specificity and inhibition of human kynurenine aminotransferase I ppt

Báo cáo khoa học: pH dependence, substrate specificity and inhibition of human kynurenine aminotransferase I ppt

... hKAT -I, and also provides biochemical information about the s ubstrate specificity and cosubstrate inhibition of the enzyme. hKAT -I is inhibited by Tris under physiological pH conditions, w hichexplains ... transamination of kynurenine toKYNA, arbitrarily termed KAT- I and II , have b eendescribed in r at and human brains [14–16].In addition, KYNA is involved in maintaining physio-logical arterial ... (including, kynurenine, phenylalanine, tryptophan and tyrosine); sulfurcontaining amino a cids (including, methionine an d cysteine) and other aliphatic a mino acids (including, glutamine,leucine, histidine,...
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Báo cáo khoa học: Predicting the substrate specificity of a glycosyltransferase implicated in the production of phenolic volatiles in tomato fruit pptx

Báo cáo khoa học: Predicting the substrate specificity of a glycosyltransferase implicated in the production of phenolic volatiles in tomato fruit pptx

... and Pro15 anchors this loop within the vicinity of the active site, therefore significantly reducing the size and accessibility of the acceptor binding pocket(Fig. S6). In SlUGT5, this tyrosine ... b-isosalicin isomer overb-salicin (Fig. 4C). It is more difficult to determine whycluster 3 would favour b-isosalicin formation, but theexact positioning of the catalytic histidine is likely ... aromacompounds during tomato fruit ripening. To determinethe substrate specificity of SlUGT5, recombinant pro-tein was expressed in E. coli and purified using acobalt affinity resin. The activity of the...
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Tài liệu Báo cáo khoa học: Substrate specificity and inhibition of brassinin hydrolases, detoxifying enzymes from the plant pathogens Leptosphaeria maculans and Alternaria brassicicola ppt

Tài liệu Báo cáo khoa học: Substrate specificity and inhibition of brassinin hydrolases, detoxifying enzymes from the plant pathogens Leptosphaeria maculans and Alternaria brassicicola ppt

... [8,9].Depending on the type of stress, crucifers biosynthesizedifferent blends of phytoalexins that appear to havemultiple roles, including microbial growth inhibition and inhibition of certain fungal ... char-acteristics, a significant understanding of the enzymesinvolved in the detoxification of phytoalexins, includ-ing their substrate specificity as well as the molecularmechanisms of detoxification, is ... Toward the control of Leptosphaeria maculans: Design, synthesis, biologicalactivity, and metabolism of potential detoxificationinhibitors of the crucifer phytoalexin brassinin. BioorgMed Chem 14,...
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Báo cáo khoa học: Comparing the substrate specificities of cytochrome c biogenesis Systems I and II docx

Báo cáo khoa học: Comparing the substrate specificities of cytochrome c biogenesis Systems I and II docx

... the identification of essential histidine residueswithin ResBC proposed to act as axial ligands to hemeiron [20]. However, little is known about the substrate recognition or specificity of System ... of ResB and ResC.Heterologous expression of ResBC in Escherichia coli lacking its own bio-genesis machinery allowed us to investigate the substrate specificity of Sys-tem II. ResBC is able ... staining of the gel, of periplasmicfractions from cells expressing P. denitrificans cytochrome c550 and the indicated biogenesis system (I or II). The periplasmic fractionfrom cells expressing...
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Báo cáo khoa học: Probing the substrate specificities of matriptase, matriptase-2, hepsin and DESC1 with internally quenched fluorescent peptides potx

Báo cáo khoa học: Probing the substrate specificities of matriptase, matriptase-2, hepsin and DESC1 with internally quenched fluorescent peptides potx

... indicat-ing that there was some substrate inhibition. Initial reactionvelocities for matriptase-2 were fitted to an equation(Eqn 1) describing substrate inhibition [49] (a modifiedform of Michaelis–Menten ... III (SerpinC1)with heparin exhibited the strongest inhibitory effectson TTSPs, totally inhibiting matriptase, matriptase-2 and hepsin, and leaving DESC1 with 8% residualactivity. Interestingly, ... number of internally quenched fluorescent (IQF)peptides and their sensitivity to various chemical and physiological inhibitors. In a side-by-side comparison,we find that these TTSPs exhibit specific...
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Báo cáo khoa học: Differences in substrate specificities between cysteine protease CPB isoforms of Leishmania mexicana are mediated by a few amino acid changes potx

Báo cáo khoa học: Differences in substrate specificities between cysteine protease CPB isoforms of Leishmania mexicana are mediated by a few amino acid changes potx

... Solid-Phase Organic Combinatorial Chemistry, Department of Chemistry, CarlsbergLaboratory, Valby, Denmark;5Division of Infection and Immunity, Institute of Biomedical and Life Sciences,Joseph ... specificities determined using a series of fluorogenicpeptide derivatives in which substitutions were made onpositions P3to P3¢ by natural amino acids. Carboxydipep-tidase act ivities of ... authier, F. (1996) Investigation of the substra te spe-cificity of cruzipain, the major cysteine proteinase of Trypanosomacruzi, through the use of cystatin-derived substrates and inhibitors.Biochem....
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Tài liệu Báo cáo khoa học: Changes in purine specificity in tandem GAF chimeras from cyanobacterial cyaB1 adenylate cyclase and rat phosphodiesterase 2 pptx

Tài liệu Báo cáo khoa học: Changes in purine specificity in tandem GAF chimeras from cyanobacterial cyaB1 adenylate cyclase and rat phosphodiesterase 2 pptx

... high similarity between them, have prob-ably retained considerable individuality in ligandbinding and intramolecular signalling.DiscussionSo far, the structures of two tandem GAF domainsare ... mouse isoform in this region, and theGAF tandem domain from the cyaB1 AC because thisdomain, despite its sequence identity with that of cyaB2 (45% identity, 59% similarity), signals only viaGAF ... dis-criminate between the adenine and guanine of cAMP and cGMP as primary ligands.Previous experiments investigating cGMP binding toGAF domains of mammalian PDEs were designed onthe basis of...
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Tài liệu Báo cáo khoa học: Peptides corresponding to helices 5 and 6 of Bax can independently form large lipid pores pdf

Tài liệu Báo cáo khoa học: Peptides corresponding to helices 5 and 6 of Bax can independently form large lipid pores pdf

... concentration of the peptides typically yieldssigmoidal curves, indicative of co-operativity, withinflexion points corresponding to peptide concentra-tions giving 50% of maximum activity (IC50). WithLUVs ... Valencia, Spain3 ITC-CNR Institute of Biophysics, Trento, Italy4 Institut fu¨r Biologie ⁄ Biophysik, Humboldt-Universita¨t zu Berlin, GermanyMitochondria provide a critical control point ... Dasseux JL, LeMaire M & Gulik-Krzywicki T (1986) Morphologicalchanges of phosphatidylcholine bilayers induced bymelittin: vesicularization, fusion, discoidal particles.Biochim Biophys Acta 859,...
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Tài liệu Báo cáo khoa học: Arginine ethylester prevents thermal inactivation and aggregation of lysozyme pptx

Tài liệu Báo cáo khoa học: Arginine ethylester prevents thermal inactivation and aggregation of lysozyme pptx

... Aggregation of lysozyme with additive (Eur. J. Biochem. 271) 3243concentration, indicating that intermolecular interaction isthe rate-limiting step in both inactivation and aggregation of lysozyme ... ArgE E is a new candidateadditive for the prevention of thermal inactivation of lysozyme. pH dependence of the inactivation and aggregationin the presence of additivesFigure 2 shows the pH- dependent ... rates of inactivation and aggregation of lysozyme in the presence of ArgEE weresimilar to those in spermine, which is a favourable additiveto prevent t hermal inactivation and aggregation of l...
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Tài liệu Báo cáo khoa học: The undecided serpin The ins and outs of plasminogen activator inhibitor type 2 pdf

Tài liệu Báo cáo khoa học: The undecided serpin The ins and outs of plasminogen activator inhibitor type 2 pdf

... mono-meric form is also stabilized by binding to vitronectinwhile retaining its inhibitory activity. Under conditions of oxidative stress, the polymerized inactive configur-ation of PAI-2 can ... proliferation and differ-entiation, and inhibit apoptosis in a manner independent of urokinase inhi-bition. Despite these recent advances in defining the intracellular function of PAI-2, it still ... PAI-2 was localizedto eosinophil-specific granules and shown to be stillcapable of inhibiting urokinase. It was suggested thatPAI-2 might play a role in eosinophil mediated inflam-mation and...
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