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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Structure of azurin from Alcaligenes denitrificans refinement at 1.8 A resolution and comparison of the two crystallographically independent molecules.
TL;DR: Refinement has confirmed that the copper co-ordination is best described as distorted trigonal planar, with strong in-plane bonds to His46 NDelta 1, His117 N delta 1 and Cys112 S gamma, and much weaker axial interactions with Met121 S delta and Gly45 C = O.
Journal ArticleDOI
A crystallographic model for azurin at 3 Å resolution
TL;DR: The structure of the blue copper protein azurin (Mr 14,000) from Pseudomonas aeruginosa has been determined from a 3.0 A resolution electron density map computed with phases based on a uranyl derivative to 3 A resolution and a platinum derivative to3.7 A.
Journal ArticleDOI
Refined crystal structure of troponin C from turkey skeletal muscle at 2·0 Å resolution
TL;DR: The crystal structure of troponin C from turkey skeletal muscle has been refined at 2.0 A resolution and polar side-chain interactions are similar to those observed in other proteins with one exception: negatively charged side-chains interact more frequently with main-chain carbonyl oxygen atoms.
Journal ArticleDOI
Crystallographic analysis of ribulose 1,5-bisphosphate carboxylase from spinach at 2·4 Å resolution: Subunit interactions and active site
TL;DR: In this paper, the X-ray structure of the quaternary complex of ribulose 1,5-bisphosphate carboxylase/oxygenase from spinach with CO2, Mg2+ and a reaction-intermediate analogue (CABP) has been determined and refined at 2·4 A resolution.
Journal ArticleDOI
Crystal structure of sickle-cell deoxyhemoglobin at 5 A resolution.
TL;DR: Double strands, similar to those found in the Hb S crystal, can be incorporated into a fiber model that is consistent with available information on the structure of deoxy HB S fibers in vivo.
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.