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

International Tables for Crystallography (2006). Vol. F. ch. 24.3, p. 667


F. H. Allena* and V. J. Hoya

aCambridge Crystallographic Data Centre, 12 Union Road, Cambridge CB2 1EZ, England
Correspondence e-mail:


A Vista histogram of the hydrogen-bond distance, DOH, showing a sharp peak in the range 1.8–2.2 Å, well below the sum of van der Waals radii (2.62 Å). This peak can be isolated in Vista to obtain an estimate of the mean O···H separation in >C=O···H—O systems.