Results
author = "Zhang, H."
Bound ligand motion in crystalline carboxypeptidase A.
Description :
Deuterium NMR spectra for the phenyl ring deuterons have been obtained for D-phenylalanine, L-phenylalanine, phenylacetic acid, and phenyl propionic acid in randomly oriented crystals of carboxypeptidase A as a function of water content. The spectra are analyzed using a two-site jump model for pheny...
Repository :
Europe PubMed Central
Language(s) :
English
Nuclear magnetic resonance spectra for l > 1 spins in dynamically heterogeneous systems with chemical exchange among environments.
Description :
Nuclear magnetic resonance spectra for nuclei with spin l > 1 are considered in cases in which the observed nucleus may sample a rotationally immobilized and an isotropic environment that are coupled by a chemical exchange process. Spectra are simulated for the central (1/2, -1/2) transition for a 3...
Repository :
Europe PubMed Central
Language(s) :
English
Characterization of enzyme-bound ligand dynamics by solid-state NMR in the presence of ligand exchange: L-phenylalanine on carboxypeptidase A.
Description :
Deuterium NMR spectra were obtained for L-phenylalanine-d5, deuterated on the phenyl ring, in cross-linked polycrystalline samples of carboxypeptidase A containing different amounts of water. The deuterium powder pattern line shapes are simulated by extension of the theory to include both a local re...
Repository :
Europe PubMed Central
Language(s) :
English
Activation by intracellular GDP, metabolic inhibition and pinacidil of a glibenclamide-sensitive K-channel in smooth muscle cells of rat mesenteric artery.
Description :
1. Single-channel recordings were made from cell-attached and isolated patches, and whole-cell currents were recorded under voltage clamp from single smooth muscle cells obtained by enzymic digestion of a small branch of the rat mesenteric artery. 2. In single voltage-clamped cells 1 mM uridine diph...
Repository :
Europe PubMed Central
Language(s) :
English
Effect of UK-84149 on voltage-activated calcium currents of single smooth muscle cells from guinea-pig and rabbit jejunum and rabbit coronary artery.
Description :
1. Smooth muscle cells of the longitudinal muscle of the guinea-pig and the rabbit jejunum and rabbit coronary artery were dispersed by enzyme treatment and recordings of membrane current were made in the standard whole cell voltage-clamp mode and by perforated patch technique. The effect of UK-8414...
Repository :
Europe PubMed Central
Language(s) :
English
Cloning and stable maintenance of DNA fragments over 300 kb in Escherichia coli with conventional plasmid-based vectors.
Description :
Bacterial artificial chromosome (BAC) and P1-derived artificial chromosome (PAC) systems were previously developed for cloning of very large eukaryotic DNA fragments in bacteria. We report the feasibility of cloning very large fragments of eukaryotic DNA in bacteria using conventional plasmid-based ...
Repository :
Europe PubMed Central
Language(s) :
English
Clusters of clusters: self-organization and self-similarity in the intermediate stages of cluster growth of Au-Ag supraclusters.
Description :
A systematic structural investigation of a new series of high-nuclearity Au-Ag clusters containing 25, 37, 38, and 46 metal atoms led to the description of these clusters as "clusters of clusters" based on vertex-sharing icosahedra as building blocks. Based on the observed structures, a growth seque...
Repository :
Europe PubMed Central
Language(s) :
English
Variation in repeated nucleotide sequences sheds light on the phylogeny of the wheat B and G genomes.
Description :
A general method based on variation in repeated nucleotide sequences was developed for the identification of diploid species most closely related to a specific genome of a polyploid species. The utility of this method was demonstrated by showing that Triticum speltoides is the most closely related e...
Repository :
Europe PubMed Central
Language(s) :
English
Relations Between Ice Motion Observed From Avhrr And Wind In The Greenland Sea
Description :
Copyright: 1991 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work i...
Repository :
ORBIT The DTU Research Database
Language(s) :
English
Migration, Risk and Livelihoods: A Chinese Case
Author(s) :
Zhang, H.X.
Description :
China has turned from a ‘low risk’ to a ‘high risk’ society since the start of the market reforms in the late
1970s. Market, while bringing diverse livelihood opportunities to rural people, has simultaneously distributed
risks, and the exposure and vulnerability to them unequally among different soc...
Repository :
Whiterose Research Online
Language(s) :
Undetermined