International
Tables for Crystallography Volume F Crystallography of biological macromolecules Edited by M. G. Rossmann and E. Arnold © International Union of Crystallography 2006 |
International Tables for Crystallography (2006). Vol. F. ch. 21.1, p. 501
Section 21.1.7.1.4. Signal strength
aDepartment of Cell and Molecular Biology, Uppsala University, Biomedical Centre, Box 596, SE-751 24 Uppsala, Sweden |
The average strength or significance of the observed intensities can be expressed in different ways. Values that are often quoted include the percentage of reflections for which I/σ(I) exceeds a certain value (usually 3.0) and the average value of I/σ(I). Ideally, these numbers should be quoted for all resolution shells (which should not be too broad), as well as for the entire data set. However, as a minimum, the values for the two extreme (low- and high-resolution) shells and for the entire data set should be reported.