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The determination of the first‐order phase in membrane diffraction using electron density strip models
Author(s) -
Worthington C. R.
Publication year - 1981
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889881009655
Subject(s) - membrane , reflection (computer programming) , diffraction , phase (matter) , electron diffraction , electron density , order (exchange) , asymmetry , lipid bilayer , electron , chemistry , crystallography , materials science , molecular physics , physics , optics , computer science , quantum mechanics , biochemistry , organic chemistry , finance , economics , programming language
The problem of assigning the phase to the first‐order reflection in membrane diffraction is treated. Biological membrane assemblies with two membranes per unit cell and the special case of lipid bilayers are treated. Phase assignment is dependent on the origin value of the minus fluid or the minus lipid model and on the actual asymmetry of the membranes. The conditions for phase assignment are derived from a study of single‐ and three‐strip electron density models.