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Neutron research

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Displaying 851 - 875 of 914

Structure of Alanine Dehydrogenase from Archaeoglobus: Active Site Analysis and Relation to Bacterial Cyclodeaminases and Mammalian mu Crystallin

September 3, 2004
Author(s)
David T. Gallagher, H G. Monbouquette, I Schroder, Hugh Robinson, Marcia J. Holden, N Smith
The hyperthermophilic archaeon Archaeoglobus fulgidus contains an L-Ala dehydrogenase (AlaDH, EC 1.4.1.1) that is not homologous to known bacterial dehydrogenases and appears to represent a previously unrecognized archaeal group of NAD-dependent

Quantifying Uncertainty in Nuclear Analytical Measurements

July 1, 2004
Author(s)
Lloyd A. Currie
This document resulted from a request at an International Atomic Energy Agency Consultants' Meeting. Information is based on a document Foundationsand future of detection and quantification limits prepared for the 1996 Proceedings of the Joint Statistical

Crystal Structure of the Complex Between Thrombin and the Central "E" Region of Fibrin

March 2, 2004
Author(s)
I Pechik, J Madrazo, M W. Mosesson, I Hernandez, G L. Gilliland, L Medved
Non-substrate interactions of thrombin with fibrin play an important role in modulating its procoagulant activity. To establish the structural basis for these interactions, we crystallized PPACK-inhibited thrombin in complex with a fragment, Eht

Crystallization and Phasing of Alanine Dehydrogenase From Archaeoglobus Fulgidus

December 1, 2003
Author(s)
N Smith, M P. Mayhew, Hugh Robinson, A Heroux, D Charlton, Marcia J. Holden, David T. Gallagher
Alanine dehydrogenase (AlaDH) from the hyperthermophilic archaeon A. fudgidus is a dimer of 35 kdal chains. The gene (AF1665) is annotated as an ornithine cyclodeaminase based on homology with the ornithine deaminase/ mu crystallin enzyme family. It

Interdiffision in Polystyrene and End-Functional Polystyrene Thin Films Near a Solid Surface

September 10, 2003
Author(s)
Chengqing C. Wang, Vivek M. Prabhu, Christopher L. Soles, B D. Vogt, Wen-Li Wu, Eric K. Lin, Sushil K. Satija
Polymer interdiffusion near the polymer/solid interface is studied using neutron reflectometry. Bilayers of hydrogenated polystyrene (hPS) and deuterated polystyrene (dPS) or hydrogenated dicarboxy terminated polystyrene (hPS(COOH)2) and dPS are prepared

X-Ray Topography of Microgravity-Grown Ribonuclease S Crystals

August 1, 2003
Author(s)
David T. Gallagher, C Stover, D Charlton, L Arnowitz, David R. Black
Crystals of the enzyme RNase S were grown at micro and unit gravity using a dialysis-based dynamically controlled device. Crystals were grown at 24 C on space shuttle flights STS 93 and STS 95. Control crystals were grown simultaneously in ground

Crystal Structure of the YchF Protein Reveals Binding Sites for GTP and Nucleic Acid

July 1, 2003
Author(s)
A Teplyakov, G Obmolova, S Y. Chu, J Toedt, E Eisenstein, A J. Howard, G L. Gilliland
The bacterial protein encoded by the gene ychF is 1 of 11 universally conserved GTPases, and the only one whose function is unknown. The crystal structure determination of YchF was sought to help with the the functional assignment of the protein. The YchF

The Protein Data Bank (PDB)

June 1, 2002
Author(s)
H M. Berman, T Battistuz, Talapady N. Bhat, W Bluhm, P E. Bourne, K Burkhardt, L Iype, Sanjay Jain, P Fagan, J Marvin, D Padilla, Veerasamy Ravichandran, Barry I. Schneider, N Thanki, H Weissig, J Westbrook, C Zardecki
The Protein Data Bank (PDB) is the single worldwide repository of structural data of biological macromolecules. This paper describes the goals of the PDB, the systems in place for data deposition and access, how to obtain further information, and near-term

Cryosalts: Suppression of Ice Formation in Macromolecular Crystallography

August 1, 2000
Author(s)
Kenneth A. Rubinson, Jane E. Ladner, M Tordova, G L. Gilliland
Quality data collection for macromolecular cryocrystallography requires suppressing the formation of crystalline or microcrystalline ice that may result from flash-freezing crystals. Described here is the use of lithium formate, lithium chloride, and other

Role of Competitive Interactions in Growth Rate Trends of Subtilsin s88 Crystals

May 1, 2000
Author(s)
D Asthagirl, A Lenhoff, David Travis Gallagher
An orthorhombic crystal form of subtilisin BPN' variant s88 exhibits a systematic variation in growth rates of its three unique faces, resulting in pronounced variations in crystal morphology as a function of the ionic strength. We have sought to explain

Crystallization and 1.1 Angstrom Diffraction of Chorismate Lyase From Escherichia Coli

February 1, 2000
Author(s)
C Stover, M P. Mayhew, Marcia J. Holden, A Howard, David Travis Gallagher
Clorismate pathway enzymes are important as producers of nonnucleotide aromatic compounds. The enzyme chorismate layase from Escherichia coli has been crystallized in four distinct forms, three of which have been characterized by x-ray diffraction. Despite
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