Figure 4

Distributions of number of superfamilies in a SMOG cluster and of number of clusters with a given superfamily. Distributions of number of superfamilies in a SMOG cluster (f _m ) shown as log-log plots, for various linkage stringencies (A) and for different sizes of the population of solved SMOGs over the years (B). Distributions of number of clusters with a given superfamily assigned (g _n ), for various linkage stringencies (C) and for different sizes of the population of solved SMOGs over the years (D). To illustrate the sharpness of the distributions, power-law approximations of the continuous parts are shown as lines, with their exponents (γ) indicated in graph legends. In B and D, the lines for different years are very close, and only a single approximation is shown, for the most recent population of solved SMOGs. See text for details.