Tables for
Volume F
Crystallography of biological macromolecules
Edited by E. Arnold, D. M. Himmel and M. G. Rossmann

International Tables for Crystallography (2012). Vol. F, ch. 19.10, p. 630


S. Ludtkea*

aNational Center for Macromolecular Imaging, Department of Biochemistry and Molecular Biology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
Correspondence e-mail:


A representation of the Euler GUI tool. The three-dimensional reconstruction is shown (lower left), along with a projection and class average for a particular orientation identified in the asymmetric triangle on the right. Each cylinder in the asymmetric triangle represents a projection direction, with its height representing the number of particles found in that orientation.