Results 201 to 210 of about 37,441 (229)

Metal ion selectivity of oligopeptides

Dalton Trans., 2006
Metal binding affinity and selectivity of peptides are reviewed with a special emphasis on the high structural variety of peptide complexes. The most common structural type of these complexes is built up by the deprotonation and metal ion coordination of subsequent amide groups in the form of fused five-membered chelate rings. The metal ion selectivity
Imre, Sóvágó, Katalin, Osz
openaire   +2 more sources

Bacterial oligopeptide-binding proteins

Cellular and Molecular Life Sciences (CMLS), 2003
This review focuses on bacterial oligopeptide-binding proteins, which form part of the oligopeptide transport system belonging to the ATP-binding cassette family of transporters. Depending on the bacterial species, these binding proteins (OppA) capture peptides ranging in size from 2 to 18 amino acids from the environment and pass them on to the other ...
openaire   +2 more sources

Conformational Preferences of Proline Oligopeptides

The Journal of Physical Chemistry B, 2006
A conformational study on the terminally blocked proline oligopeptides, Ac-(Pro)(n)()-NMe(2) (n = 2-5), is carried out using the ab initio Hartree-Fock level of theory with the self-consistent reaction field method in the gas phase and in solutions (chloroform, 1-propanol, and water) to explore the preference and transition between polyproline II (PPII)
Young Kee, Kang, Jong Suk, Jhon, Hae Sook, Park   +2 more
openaire   +2 more sources

Self-Assembly of Homo Phenylalanine Oligopeptides: Role of Oligopeptide Chain Length

Langmuir
The self-assembly of phenylalanine (F)-based peptides is a critical area of research with potential implications for the development of advanced biomaterials and technologies. Previous studies indicate that homo-oligopeptides with F-X residues (X = 1 to 6) can self-assemble into diverse nano-microstructures, but the role of oligopeptide chain length on
Safaa Kader, Muntadher Sultan, Esmaiel Jabbari   +2 more
openaire   +2 more sources

Vibrational optical activity of oligopeptides

Biopolymers, 1995
AbstractVibrational optical activity (VOA) is a relatively newspectroscopic technique, which has two principal manifestations, ir vibrational CD and vibrational Raman optical activity. Progress in the study of oligopeptides using both of these forms of VOA is reviewed from the perspective of theoretical and instrumental techniques, spectral results ...
T B, Freedman, L A, Nafie, T A, Keiderling   +2 more
openaire   +2 more sources

Molecular Radical Cations of Oligopeptides

The Journal of Physical Chemistry B, 2000
An unprecedented method of producing molecular radical cations of oligopeptides in the gas phase has been discovered. Electrospraying a methanolic mixture of a Cu(II)−amine complex, e.g., CuII(dien)(NO3)2 (where dien = diethylenetriamine), and an oligopeptide (M) yields the [CuII(dien)M]•2+ ion, whose collision-induced dissociation (CID) produces [CuI ...
Hopkinson, AC, Chu, IK, Rodriquez, CF, Lau, TC, Michael Siu, KW   +4 more
openaire   +3 more sources

Interaction of Oligopeptides with Heparin

Macromolecular Symposia, 1998
Macromolecular drugs, such as heparin and insulin, are easily degraded by acids and enzymes in the GI tract and do not readily penetrate the lipophilic biomembranes, resulting in low bioavailability by the oral route.1–3 Currently, these drugs have to be administered by injections. Proteinoids,4–8 which can form microspheres with certain macromolecular
Ruifeng Zhao, Mamoru Haratake, Raphael M. Ottenbrite   +2 more
openaire   +1 more source

Conformational mobility in cyclic oligopeptides

Biopolymers, 1993
AbstractAnalysis of two isomeric cyclic hexapeptides of composition (Asp, Arg, Gly2, Pro, D‐Pro) by a nuclear Overhauser effect constrained distance geometry conformation search yielded a narrowly defined backbone conformation for one and considerable ambiguity about the conformation in part of the other.
K D, Kopple, J W, Bean, K K, Bhandary, J, Briand, C A, D'Ambrosio, C E, Peishoff   +5 more
openaire   +2 more sources

EFFECT OF SYNTHETIC OLIGOPEPTIDES ON OSTEOPOROSIS

Preparative Biochemistry & Biotechnology, 2002
The objective of this study was to establish the solution method of GHRPS, the synthetic oligopeptides Tyr-Gly-Gly-Phe-Met-NH2, Tyr-Gly-Gly-Phe-Met-OH, Tyr-Gly-Gly-Phe-Leu-NH2, Tyr-Gly-Gly-Phe-Leu-OH, Tyr-Gly-Gly-Phe-Gly-NH2, and Tyr-Gly-Gly-Phe-Gly-OH, to verify their effect on osteoporosis. Male ICR mice (20+/-2 g) were used.
Cui, Weina, Wang, Chao, Zhao, Ming, Peng, Shiqi   +3 more
openaire   +3 more sources

Liposomalized Oligopeptides in Cancer Therapy

2005
Organ-specific delivery of biofunctional agents is thought to enhance their activity and to reduce their side effects. Liposomes have been used as drug carriers in cancer chemotherapy, since they accumulate passively in tumor tissues due to an enhanced permeability and retention (EPR) effect. In addition, modification of liposomes with specific ligands
Tomohiro, Asai, Naoto, Oku
openaire   +2 more sources