Báo cáo khoa học: "Structure, composition chimique et retraits de maturation du bois chez les clones d’Eucalyptus" pdf

... l’exis-tence de cellules analogues à du bois de tension chez des Gymnospermes et descellules analogues à du bois de compres-sion chez des Angiospermes (Höster et Liese, 1966 ... génétique et sylvicole, tri et classe-ment des bois abattus).Article originalStructure, composition chimique et retraits de maturation du bois chez les clones d’EucalyptusH BaillèresB ... mor-phologique des bois de tension usuellementréalisée ne permet pas de distinguer des bois de tension intenses ou faibles. De plus,le bois diamétralement opposé à une zone de bois...

Tài liệu Báo cáo khoa học: Structure and membrane interaction of the internal fusion peptide of avian sarcoma leukosis virus pdf

... peptide in SDSmicelle with the notion that slower exchange correlates withdeeper penetration into the micelle for the residue underconsideration. Another method to gauge the insertion depthis ... were recorded on a BomanDA8.3 spectrometer with a KBr beamsplitter and a liquidnitrogen-cooled MCT detector according to proceduresdescribed previously [20]. Each of the studied peptides(20 ... theinternal fusion peptide [35] to destabilize the membrane.An oblique insertion of fusion p eptide of SIV gp32 andinﬂuenza HA2 has been deduced by Martin et al.[36]and by Lu¨nerberg et al. [37] from...

Báo cáo khoa học: Structure–function relationship of novel X4 HIV-1 entry inhibitors – L- and D-arginine peptide-aminoglycoside conjugates pptx

... polycarbamoylated products. The sol-vents were removed under reduced pressure; and the residuewas dissolved in water and washed with ethyl acetate(3 · 25 mL). The aqueous layer was evaporated underreduced ... demonstrated complete conversion of thestarting material to the desired compound. Solvents wereremoved under reduced pressure, and extracted three timeswith warm ethyl acetate. The ethyl acetate layer ... dimethyformamidesolution of the protected aminoglycoside (1a, 2a or 3a).The resulting mixture was stirred for approximately 15 h,and was concentrated under reduced pressure. Detailedprocedures...

Tài liệu Báo cáo khoa học: Structure and function of active chromatin and DNase I hypersensitive sites pdf

... ATP-dependent chro-matin remodeling enzymes: two heads are not better,just different. Curr Opin Genet Dev 18, 137–144.25 Clapier CR & Cairns BR (2009) The biology of chro-matin remodeling ... that activegene loci decondense completely into these unfolded10-nm diameter ﬁbres. In reality, the eukaryotic gen-ome is assembled in a much more condensed stateunder physiological conditions, ... chal-lenged by an independent cryo-EM analysis of meta-phase chromosomes which depicted homogeneousgrainy images of chromatin sections with no evidencefor any discrete higher order ﬁbre formation...

Tài liệu Báo cáo khoa học: Structure of RNase Sa2 complexes with mononucleotides – new aspects of catalytic reaction and substrate recognition pptx

... side chain, whichappears to depend on whether the mononucleotide isin the syn-conformation or anti-conformation. InRNase Sa2–3¢-GMP (anti-conformation), the sidechain of Arg34 points outside ... trinucleotides with aleading guanosine (16 molecules), were constructed withmodule build from maestro. All ligands were prepared fordocking with the help of the ligprep module, using defaultparameters ... from O2¢ of the ribose. Extended molecular docking of mononucleo-tides, dinucleotides and trinucleotides into the active site of the enzymeallowed us to better understand the guanosine speciﬁcity...

Tài liệu Báo cáo khoa học: Structure of the putative 32 kDa myrosinase-binding protein from Arabidopsis (At3g16450.1) determined by SAIL-NMR docx

... full sequence was considered(residues 1-299), each individual domain (residues 1-144or residues 153-299) superimposed well when consideredseparately (Fig. 2A,B). Residues 16–21 and 45–47 exhib-ited ... (2007)Automated structure determination of proteins with theSAIL-FLYA NMR method. Nat Protoc 2, 2896–2902.26 Lo´pez-Me´ndez B & Gu¨ntert P (2006) Automated pro-tein structure determination from ... TheC-terminal domain yielded reasonably well-convergedstructures, including the side-chain conformations ofresidues in its core (Fig. 2C,D).Residues 145–152 in the linker region between thetwo domains...

Tài liệu Báo cáo khoa học: Structure determination and biochemical studies on Bacillus stearothermophilus E53Q serine hydroxymethyltransferase and its complexes provide insights on function and enzyme memory doc

... was measured by estimating (at 340 nm) the rate ofNADH-dependent reduction of acetaldehyde to ethanol andNAD+catalyzed by alcohol dehydrogenase present in anexcess amount in the reaction ... assaysTHF-dependent cleavage of l-Ser to Gly was monitoredusing l-[3)14C]-Ser and THF as substrates [34]. THF-inde-pendent aldol cleavage of l-allo-Thr to Gly and acetalde-hyde was measured ... presenceofL-allo-threonineApart from folate-dependent interconversion of l-Serand Gly, SHMT also catalyses the folate-independentconversion of l-allo-Thr to Gly and acetaldehyde.Attempts to crystallize bsSHMT...

Tài liệu Báo cáo khoa học: Structure and function of plant aspartic proteinases pptx

... Carlos FaroDepartamento de Biologia Molecular e Biotecnologia, Centro de Neurocieˆncias e Biologia Celular, Universidade de Coimbra andDepartamento de Bioquı´mica, Faculdade de Cieˆncias ... [77]. In another studyphytepsin was detected during the onset of DNA fragmen-tation in germinating barley scutella [84].During daylily petal senescence and cell death, severalgenes were shown ... mannose-6-phosphateindependent targeting of the latter to the lysosome [43,44].An important difference between both targeting mecha-nisms is that in plants, APs and the PSI sorting domain5are encoded in...

Tài liệu Báo cáo khoa học: Structure-activity relationships of a-conotoxins targeting neuronal nicotinic acetylcholine receptors ppt

... byblue shaded circles and single letter amino acid codes. Red circles indicate the residues that have been associated with biological activity in one ormore conotoxin. White circles represent ... extended the investigation to examine the role ofdifferent disul de bond isomers in determining structures.The structures of PnIA, PnIB and the desulfated form ofnative EpI ([Y15]EpI) were determined ... bonds.Several structures have been determined independentlyby different groups and the structures appear to be in goodagreement. The structure of ImI in solution has beendetermined in ﬁve studies,...

Tài liệu Báo cáo khoa học: Structure of peptidase T from Salmonella typhimurium doc

... been deposited in the Protein D ata Bank and have theaccession code 1FNO [15].RESULTSOverall structureThe ®nal model consists of residues M et1 ±Gly408 (seeMaterials and methods). All 15 methionines ... C-terminalresidue 409 along with the C-terminal hexahistidine tagshowed no signi®cant density at a ll. Outside t hese parts, thepolypeptide chain is g enerally well de ned by the2|Fo| ) |Fc| density ... The side-chains of residuesArg99, Asp109, Val115 and Tyr378, however, were not de ned beyond the Cb atom. Most of the solvent densitywas relatively weak and the modeled solvent molecules havehigh...

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