Journal ArticleDOI
A semi-empirical method of absorption correction
TLDR
An extension of Furnas's method is described in this paper, where the variation of intensity of an axial reflection as the crystal is rotated about the goniometer axis is used to give a curve of relative transmission T against azimuthal angle ϕ for the corresponding reciprocal lattice level.Abstract:
An extension of Furnas's method is described. The variation of intensity of an axial reflection as the crystal is rotated about the goniometer axis is used to give a curve of relative transmission T against azimuthal angle ϕ for the corresponding reciprocal lattice level. Transmission coefficients for any general reflexion hkl are then given approximately by T(hkl) = [T(ϕinc) + T(ϕret)]/2 where ϕinc and ϕret are the azimuthal angles of the incident and reflected beams. Equations are derived for (ϕinc and ϕret and the accuracy of the method is discussed.read more
Citations
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Journal ArticleDOI
X-ray crystal structure of D-xylose isomerase at 4-A resolution.
TL;DR: The structure of D-xylose isomerase from Streptomyces rubiginosus has been determined at 4-A resolution using multiple isomorphous phasing techniques and the location of the active site in the enzyme has been tentatively identified from studies using a crystal grown from a solution containing the inhibitor xylitol.
Journal ArticleDOI
Crystallization and structure determination of an autoimmune anti-poly(dT) immunoglobulin Fab fragment at 3.0 A resolution.
TL;DR: The structure of Fab HED10 was solved by the molecular replacement method using the known structure of McPC603 and is refined to R = 27.2% at 3.0 A resolution, very similar to that observed in Fab KOL.
Journal ArticleDOI
Structure of the pure-spermine form of Z-DNA (magnesium free) at 1-A resolution.
TL;DR: Three-dimensional X-ray structure of a complex of spermine bound to a Z-DNA duplex, [d(CGCGCG)]2, in the absence of any inorganic polyvalent cations is described, suggesting that the molecular basis for the tendency of sPermine to stabilize compact DNA structures derives from the capacity of s permine to interact simultaneously with several duplexes.
Journal ArticleDOI
Amide Group Coordination to the Pb2+ Ion
TL;DR: This work provides new information on the solution and solid state chemistry of dipositive lead with ligands of biological interest, a research area that has received little attention in the past, although it is of great relevance for understanding the mechanisms of metal toxicity.
Journal ArticleDOI
Crystal structure of Y0.9Ba2.1Cu3O6, a compound related to the high-Tc superconductor YBa2Cu3O7
TL;DR: The crystal structure of the high-temperature superconductor YBa2Cu3O7 is derived from the ideal perovskite structure by the presence of ordered vacancies in the oxygen sublattice.
References
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Book
International tables for X-ray crystallography
Norman Fordyce McKerron Henry,Lonsdale, Kathleen, Dame,John S. Kasper,Caroline H. MacGillavry,Gerard D. Rieck,James A. Ibers,Walter C. Hamilton +6 more
ReportDOI
A fortran program for calculating single crystal absorption corrections
D.J. Wehe,W.R. Busing,H.A. Levy +2 more
TL;DR: A Fortran program is described for calculating the absorption correction for application to single crystal x ray or neutron intensity measurements and is available in the form of symbolic punched cards.