PubMed Central (PMC3 - NLM DTD)
Archive of life sciences journal literature at the U.S. National Institutes of Health (NIH), developed and managed by NIH's National Center for Biotechnology Information (NCBI) in the National Library of Medicine (NLM).
Acta Crystallographica Section A: Foundations of Crystallography
Mostrando recursos 1 - 15 de 15
Structural constraints on the three-dimensional geometry of simple viruses: case studies of a new predictive tool - Keef, Thomas; Wardman, Jessica P.; Ranson, Neil A.; Stockley, Peter G.; Twarock, Reidun
A new concept in virology provides insights into structural constraints on virus structure, extending Caspar–Klug theory to include predictions across all radial levels of the virus particle including genome organization. The predictive power of the new tool is demonstrated for a range of viruses, revealing a previously unrecognized structural interdependence of shapes and sizes of different viral components.
High-resolution study of (002, 113, 11−1) four-beam diffraction in Si - Kohn, V. G.; Kazimirov, A.
A high-resolution study of (002, 113, 11−1) four-beam diffraction in Si was performed both experimentally and theoretically. Excellent coincidence between theory and experiment was achieved. The forbidden two-beam 002 reflection was excited with the maximum reflectivity of 80%.
eq are more equivalent than others - Merritt, Ethan A.
eq is a well defined entity that represents one property, mean-square displacement, of the anisotropic atomic displacement parameter tensor from which it is derived. B
eq is not, however, the best estimate of the B factor that would result from isotropic model refinement. A new entity B
est is proposed to serve this purpose.
Structure-factor analysis of femtosecond microdiffraction patterns from protein nanocrystals - Kirian, Richard A.; White, Thomas A.; Holton, James M.; Chapman, Henry N.; Fromme, Petra; Barty, Anton; Lomb, Lukas; Aquila, Andrew; Maia, Filipe R. N. C.; Martin, Andrew V.; Fromme, Raimund; Wang, Xiaoyu; Hunter, Mark S.; Schmidt, Kevin E.; Spence, John C. H.
A complete set of structure factors has been extracted from hundreds of thousands of femtosecond X-ray diffraction patterns from randomly oriented Photosystem I membrane protein nanocrystals, using the Monte Carlo method of intensity integration. The data, collected at the Linac Coherent Light Source, are compared with conventional single-crystal data collected at a synchrotron source, and the quality of each data set was found to be similar.
Translation calibration of inverse-kappa goniometers in macromolecular crystallography - Brockhauser, Sandor; White, Kristopher I.; McCarthy, Andrew A.; Ravelli, Raimond B. G.
A rapid, easy-to-perform translation calibration procedure has been developed for use with the EMBL/ESRF mini-κ goniometer head and for other inverse-kappa goniometers designed for macromolecular crystallography. Regular calibration ensures the precision of experiments that rely on many degrees of freedom in crystal reorientation.
Time-resolved structural studies of protein reaction dynamics: a smorgasbord of X-ray approaches - Westenhoff, Sebastian; Nazarenko, Elena; Malmerberg, Erik; Davidsson, Jan; Katona, Gergely; Neutze, Richard
Time-resolved structural studies of proteins have undergone several significant developments during the last decade. Recent developments using time-resolved X-ray methods, such as time-resolved Laue diffraction, low-temperature intermediate trapping, time-resolved wide-angle X-ray scattering and time-resolved X-ray absorption spectroscopy, are reviewed.
Five-dimensional crystallography - Schmidt, Marius; Graber, Tim; Henning, Robert; Srajer, Vukica
Here it is demonstrated how five-dimensional crystallography can be used to determine a comprehensive chemical kinetic mechanism in concert with the atomic structures of transient intermediates that form and decay during the course of the reaction.