Figure 6
From: Origin and evolution of gene families in Bacteria and Archaea
Maximum Likelihood fits of five models to the mean family size distribution F(n) in genomes from (A) 92 Bacteria and (B) 79 Archaea clustered at E cut = 1e-20 and f min = 0.7. BDI3 is the best fit for the constituent genomes. As there are few families larger than n = 20, the data point at n = 20 shows the sum of all families with n ≥ 20, and the theory points at n = 20 show the sum of the predicted frequencies of all families with n ≥ 20. Hence the apparent spike in these distributions.