Figure 3.

Time course of the frequency of different replicator types. Mono-active replicators with active centre {1} (blue), {2} (red), and {3} (green); bi-active replicators with two active centres {1,2} (purple), {1,3} (pink), and {2,3} (orange); replicators with all three types of active centre {1,2,3} (brown), and parasitic replicators without enzymatic activity {P} (grey). A: D = 4, h = 3x3, b ₂ = 0.05 (default parameter set). B: D = 4, h = 3x3, b ₂ = 0.001. Notice the different frequency scale (right vertical axis) for promiscuous enzymes!