Figure 4.

Power-law distribution of Pfam domains and small molecule ligands. (a-c) Log-log plots of observed distributions. X-Axis: proteome frequency of Pfam-A domains (a), ligands per Pfam domain (b), ligands per target (c). y-Axis: Number of instances with count X equal to corresponding x-value. (d-f) Corresponding cumulative distribution functions overlaid with the fit of the power-law distribution (dotted line). X-Axis: proteome frequency of Pfam-A domains (d), ligands per Pfam domain (e), ligands per target (f). Y-Axis: Proportion of instances with count X equal to or greater than x.

Kruger et al. BMC Bioinformatics 2012 13(Suppl 17):S11   doi:10.1186/1471-2105-13-S17-S11