Phase change in amylose-water mixtures as seen by Fourier transform infrared.

abstract：:Reactive oxygen species (ROS) have generated a great deal of interest in the clinical field since experimental studies showed the involvement of these species in carcinogenesis. This paper reports the detection of ROS during the decomposition of H2O2 in the presence of samples obtained from tissues of 16 patients with...

journal_title：Biopolymers

authors： Kładny J,Lichszteld K,Kołecki J

更新日期：2004-08-05 00:00:00

abstract：:An examination of x-ray structures of single-cluster [4Fe-4S] proteins in the Protein Data Bank has revealed that all redox proteins and the glutamine 5-phosphoribosyl-l-pyrophosphate amidotransferase from Bacillus subtilis have a topological configuration arbitrarily designated as D, whereas the DNA repair enzyme end...

journal_title：Biopolymers

authors： Liang C,Mislow K

更新日期：1997-10-05 00:00:00

abstract：:The interaction of an RGD-containing epitope from the hepatitis A virus VP3 capsid protein and its RGA-analogue with lipid membranes was studied by biophysical methods. Two types of model membrane were used: vesicles and monolayers spread at the air/water interface, with a composition that closely resembles the lipid ...

journal_title：Biopolymers

authors： Chávez A,Pujol M,Haro I,Alsina MA,Cajal Y

更新日期：2001-01-01 00:00:00

abstract：:The structures of the helices II-III region and the helix IV region of B. megaterium 5S rRNA have been examined by means of energy minimization and molecular dynamics calculations. Calculated distances between neighboring hydrogen-bonded imino protons in helices II, III, and IV were between 3.5 and 4.5 A. The overall ...

journal_title：Biopolymers

authors： Kim JH,Marshall AG

更新日期：1992-09-01 00:00:00

abstract：:Solid state nmr methods were applied to the study of the motions and structural heterogeneity in polyglycine, sodium poly(L-glutamate), and poly(L-alanine). The response of both the main-chain and side-chain resonances to the addition of water was studied using static and magic-angle sample-spinning line shapes as wel...

journal_title：Biopolymers

authors： Kennedy SD,Bryant RG

更新日期：1990-01-01 00:00:00

abstract：:Peptides, peptidomimetics, and peptide derivatives that self-assemble into fibrillar gels have received increasing interest as synthetic extracellular matrices for applications in 3D cell culture and regenerative medicine. Recently, several of these fibrillizing molecules have been functionalized with bioactive compon...

journal_title：Biopolymers

authors： Jung JP,Gasiorowski JZ,Collier JH

更新日期：2010-01-01 00:00:00

abstract：:Intermolecular NOE experiments have been used to explore interactions of water and ethanol molecules in 35% ethanol/65% water (v/v) with the peptide Trp-cage at temperatures from 5 to 25 degrees C. Magnetic dipole-dipole cross-relaxation terms sigma(HH) (NOE) and sigma(HH) (ROE) for interaction of solvent components w...

journal_title：Biopolymers

authors： Neuman RC Jr,Gerig JT

更新日期：2008-10-01 00:00:00

abstract：:The thermal conformational transitions of two sonicated samples of schizophyllan were studied in water-dimethylsulfoxide (DMSO) mixtures by high-sensitivity differential scanning calorimetry (DSC). Two transitions were observed over most of the range of solvent compositions. These were assigned to an internal change o...

journal_title：Biopolymers

authors： Kitamura S,Kuge T

更新日期：1989-02-01 00:00:00

abstract：:Bacteria contain a diverse set of RNAs to provide tight regulation of gene expression in response to environmental stimuli. Bacterial small RNAs (sRNAs) work in conjunction with protein cofactors to bind complementary mRNA sequences in the cell, leading to up- or downregulation of protein synthesis. In vivo imaging of...

journal_title：Biopolymers

authors： Kitto RZ,Christiansen KE,Hammond MC

更新日期：2021-01-01 00:00:00

abstract：:The association behavior of beta-lactoglobulin has been studied by small-angle neutron scattering as a function of protein concentration, temperature, pH, and NaCl concentration of the solution. By indirect Fourier transformation of the spectra, pair-distance distribution functions for the various samples were obtaine...

journal_title：Biopolymers

authors： Verheul M,Pedersen JS,Roefss SP,de Kruif KG

更新日期：1999-01-01 00:00:00

abstract：:The ability of an exopolymer of glycoproteic character (GP) excreted by a new gram-negative species Pseudoalteromonas antarctica NF(3), to coat phosphatidylcholine (PC) liposomes and to protect these bilayers against the action of the nonionic surfactant dodecyl maltoside was investigated. Transmission electron micros...

journal_title：Biopolymers

authors： de La Maza A,Codech L,Lopez O,Parra JL,Sabes M,Guinea J

更新日期：1999-11-01 00:00:00

abstract：:Poly(dimer acid-brassylic acid) [P(DA-BA)] copolymers and poly(dimer acid-pentadecandioic acid) [P(DA-PA)] copolymers were prepared by melt polycondensation of the corresponding mixed anhydride prepolymers. The copolymers were characterized by Fourier transform infrared (FTIR), gel permeation chromatography (GPC), dif...

journal_title：Biopolymers

authors： Guo WX,Huang KX

更新日期：2004-06-15 00:00:00

abstract：:A series of novel nonpeptide inhibitors of the pp60(c-Src) (Src) SH2 domain is described that exploit multifunctional group replacement of the phenylphosphate moiety of phosphotyrosine (pTyr). Relative to an x-ray structure of citrate complexed to the pTyr binding site of the Src SH2 domain, these nonpeptide ligands i...

journal_title：Biopolymers

authors： Sundaramoorthi R,Kawahata N,Yang MG,Shakespeare WC,Metcalf CA 3rd,Wang Y,Merry T,Eyermann CJ,Bohacek RS,Narula S,Dalgarno DC,Sawyer TK

更新日期：2003-01-01 00:00:00

abstract：:It is shown by using the vibronic approach that the iron displacement out of the porphyrin plane in deoxyheme proteins intermixes the porphyrin pi and axial iron-histidine sigma electronic subsystems. This intermixing explains the substantial coupling of the iron-histidine vibration to the heme Soret excitation, the a...

journal_title：Biopolymers

authors： Stavrov SS

更新日期：2004-05-01 00:00:00

abstract：:Recent studies on the conformational preferences of the Dphig (C(alpha,alpha)-diphenylglycine) residue showed that this C(alpha,alpha)-disubstituted glycine has a structural versatility. In fact, depending on the nature of the following or preceding residue, Dphig can assume either folded or extended conformations. We...

journal_title：Biopolymers

authors： Pavone V,Lombardi A,Saviano M,De Simone G,Nastri F,Maglio O,Omote Y,Yamanaka Y,Yamada T

更新日期：2000-02-01 00:00:00

abstract：:Surfactant protein C (SP-C) is an important constituent of lung surfactant (LS) and, along with SP-B, is included in exogenous surfactant replacement therapies for treating respiratory distress syndrome (RDS). SP-C's biophysical activity depends upon the presence of a rigid C-terminal helix, of which the secondary str...

journal_title：Biopolymers

authors： Brown NJ,Lin JS,Barron AE

更新日期：2019-06-01 00:00:00

abstract：:The abnormal aggregation of amyloid proteins is reported to play a critical role in the etiology of neurodegenerative disorders. Studies have shown that excessive ferric irons are associated with the misfolding of amyloid proteins, and that (-)-epigallocatechin gallate (EGCG) is a good metallic ion chelator with inhib...

journal_title：Biopolymers

authors： Xu L,Tu S,Chen C,Zhao J,Zhang Y,Zhou P

更新日期：2016-02-01 00:00:00

abstract：:Amyloid fibrils are considered to play causal roles in the pathogenesis of amyloid-related degenerative diseases such as Alzheimer's disease, type II diabetes mellitus, the transmissible spongiform encephalopathies, and prion disease. The mechanism of fibril formation is still hotly debated and remains an important op...

journal_title：Biopolymers

authors： Chen Y,He YJ,Wu M,Yan G,Li Y,Zhang J,Chen HF

更新日期：2010-06-01 00:00:00

abstract：:The structure of a bacterial cell wall may alter during bacterial reproduction. Moreover, these cell wall variations, on a nanoscale resolution, have not yet fully been elucidated. In this work, Raman spectroscopy and atomic force microscopy (AFM) technique are applied to evaluate the culture time-dependent cell wall ...

journal_title：Biopolymers

authors： McEwen GD,Wu Y,Zhou A

更新日期：2010-02-01 00:00:00

abstract：:Synthetic model membrane-interactive peptides--both of natural and designed sequence--have become convenient and systematic tools for determination of how the membrane-spanning segments within integral membrane proteins confer protein structure and biology. Conformational studies on these peptides demonstrate that the...

journal_title：Biopolymers

authors： Deber CM,Li SC

更新日期：1995-01-01 00:00:00

abstract：:Near uv CD spectra of Trp residues in proteins frequently show a complex line shape deriving from the overlap of 1La and 1Lb electronic transitions. This study presents an original empirical method of resolving these components, based on the near uv CD spectra of well-defined complexes of calmodulin domains with targe...

journal_title：Biopolymers

authors： Barth A,Martin SR,Bayley PM

更新日期：1998-06-01 00:00:00

abstract：:A highly potent and selective agonist to the tachykinin NK-3 receptor, [pGlu6,N-MePhe8,Aib9] substance P (6-11) (I), was synthesized via the solid phase method. The ED50 of I was 4 nM in the guinea pig ileum in the absence of atropine (NK-1+NK-3 receptors) and this agonist was 5000-fold less potent in the presence of ...

journal_title：Biopolymers

authors： Tallon M,Ron D,Halle D,Amodeo P,Saviano G,Temussi PA,Selinger Z,Naider F,Chorev M

更新日期：1993-06-01 00:00:00

abstract：:We describe the synthesis of several polyamides that retain the secondary structure of proteins and contain derivatizable side chains. The derivatizable side chain allows for further reaction of the polymer chain (e.g., chain cross-linking or addition of pendant groups). Polymers of alpha-amino acids containing a term...

journal_title：Biopolymers

authors： Guinn RM,Margot AO,Taylor JR,Schumacher M,Clark DS,Blanch HW

更新日期：1995-05-01 00:00:00

abstract：:Three new polyoxaalkyl esters of lasalocid are synthesized. Their ability to form complexes with Li(+) and Na(+) cations is studied using multinuclear NMR methods, FTIR spectroscopy in the middle and far IR regions, and mass spectrometry. It is found that lasalocid esters form only 1:1 complexes with the metal cations...

journal_title：Biopolymers

authors： Pankiewicz R,Schroeder G,Gierczyk B,Brzezinski B,Bartl F

更新日期：2002-10-15 00:00:00

abstract：:The presence of non-native kinetic traps in the free energy landscape of a protein may significantly lengthen the overall folding time so that the folding process becomes unreliable. We use a computational model alpha-helical hairpin peptide to calculate structural free energy landscapes and relate them to the kinetic...

journal_title：Biopolymers

authors： Chapagain PP,Gerstman BS

更新日期：2006-02-15 00:00:00

abstract：:Gold nanoparticles are known to aggregate in the presence of proper multifunctional compounds. For those larger than 3 nm, the process can be followed with the naked eye because the surface plasmon absorption band of the particles shifts to longer wavelengths and the solution color changes from red to blue. To exploit...

journal_title：Biopolymers

authors： Martínez Á,Scrimin P

更新日期：2018-08-01 00:00:00

abstract：:Lung cancer is usually fatal once it becomes metastatic. However, in order to develop metastases, a tumor usually invades the basal membrane and enters the vascular or lymphatic system. In this study, a three-dimensional artificial membrane using collagen type I, one of the main components of basal membranes, was esta...

journal_title：Biopolymers

authors： Yang Y,Sulé-Suso J,Sockalingum GD,Kegelaer G,Manfait M,El Haj AJ

更新日期：2005-08-15 00:00:00

abstract：:Translational GTPases (trGTPases) play key roles in facilitating protein synthesis on the ribosome. Despite the high degree of evolutionary conservation in the sequences of their GTP-binding domains, the rates of GTP hydrolysis and nucleotide exchange vary broadly between different trGTPases. EF-Tu, one of the best-ch...

journal_title：Biopolymers

authors： Maracci C,Rodnina MV

更新日期：2016-08-01 00:00:00

abstract：:The differences in the absorbance in the mid infrared region (Mid IR) between normal and abnormal tissues have been shown to be a possible criterion for the detection of different forms of cancer. The present work aimed to study the effects of cell growth and DNA synthesis on the RNA/DNA ratio, which is a promising pa...

journal_title：Biopolymers

authors： Sahu RK,Mordechai S,Manor E

更新日期：2008-11-01 00:00:00

abstract：:The natural amino acids are primarily helix breakers at the low assignment temperatures characteristic of many studies, but recent genomic analyses of thermophilic proteins suggest that at high temperatures, some breakers may become strong helix formers. Moreover, the breaker/former inventory has not been previously c...

journal_title：Biopolymers

authors： Nasr KA,Schubert CR,Török M,Kennedy RJ,Kemp DS

更新日期：2009-05-01 00:00:00