Figure 4 Significance of anomalous signals from random half data sets. (a) Scatter plot of Ianom pairs for the peak data set shown in Fig. 3, showing a strong correlation. (b) R.m.s. correlation ratio (see text) as a function of resolution: filled circles, acentric data; open circles, centric data. (c) Scatter plot for a native data set, showing no anomalous signal. (d) R.m.s. correlation ratio for native data set.

© International Union of Crystallography 2006