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
Syntheses, Structures, and Properties of Three Novel Coordination Polymers of Silver(I) Aromatic Carboxylates with Hexamethylenetetramine Exhibiting Unique Metal−π Interaction
Shao-Liang Zheng,Ming-Liang Tong, ,†,† Song-De Tan,Yu Wang,† Jian-Xin Shi,† Ye-Xiang Tong,and Hung Kay Lee,Xiao-Ming Chen +7 more
TL;DR: In this article, three interesting coordination polymers were obtained from the reaction of polycyclic aromatic carboxylates in MeCN solution with hmt in CH2Cl2 solution via the liquid diffusion method.
Journal ArticleDOI
Crystal structure of a lysozyme-tetrasaccharide lactone complex.
TL;DR: Analysis of the electron density map for site D indicates that the δ-lactone ring is in a conformation close to a sofa or a boat which brings the hydroxymethyl group C O (6) axial, providing support for the role of strain in the proposed mechanism of lysozyme catalysis.
Journal ArticleDOI
The crystal structure of pea lectin at 3.0-A resolution.
TL;DR: The structure of pea lectin has been determined to 3.0-A resolution and monomers were treated independently in modeling and refinement, but are found to be virtually identical at this resolution.
Journal ArticleDOI
Refinement of an enzyme complex with inhibitor bound at partial occupancy. Hen egg-white lysozyme and tri-N-acetylchitotriose at 1.75 A resolution.
TL;DR: In this paper, the structure of the tri-N-acetylchitotriose inhibitor complex of hen egg-white lysozyme has been refined at 1.75 A resolution, using data collected from a complex crystal with ligand bound at less than full occupancy.
Journal ArticleDOI
The atomic structure of crystalline porcine pancreatic elastase at 2.5 A resolution: comparisons with the structure of alpha-chymotrypsin.
L. Sawyer,David Shotton,James W. Campbell,P.L. Wendell,Hilary Muirhead,Herman C. Watson,R. Diamond,R.C. Ladner +7 more
TL;DR: Three isomorphous heavy-atom derivatives have been used to calculate a 2.5 A resolution electron density map of tosyl-elastase at pH 5.0, from which an accurate atomic model has been constructed and the significance of important structural similarities and differences between these two enzymes is discussed.
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.