International
Tables for Crystallography Volume B Reciprocal space Edited by U. Shmueli © International Union of Crystallography 2006 |
International Tables for Crystallography (2006). Vol. B. ch. 2.5, pp. 316-317
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In practice, an important case is where all the projection directions are orthogonal to a certain straight line: (Fig. 2.5.6.3). Here the axis of rotation or the axis of symmetry of an object is perpendicular to an electron beam. Then the three-dimensional problem is reduced to the two-dimensional one, since each cross section is represented by its one-dimensional projections. The direction of vector τ is defined by the rotational angle ψ of a specimen: In this case, the reconstruction is carried out separately for each level : and the three-dimensional structure is obtained by superposition of layers (Vainshtein et al., 1968; Vainshtein, 1978).
References
Vainshtein, B. K. (1978). Electron microscopical analysis of the three-dimensional structure of biological macromolecules. In Advances in optical and electron microscopy, Vol. 7, edited by V. E. Cosslett & R. Barer, pp. 281–377. London: Academic Press.Google ScholarVainshtein, B. K., Barynin, V. V. & Gurskaya, G. V. (1968). The hexagonal crystalline structure of catalase and its molecular structure. Sov. Phys. Dokl. 13, 838–841.Google Scholar