Figure 4

Three models of catalysis in a partitioned CRS. Visual representations of the three systems investigated via simulations: inter-modular (left), intra-modular (centre) and uniform (right). Labelled arrows from X _i to X _j indicate that molecules in X _i catalyse reactions involving molecules from X _j , with some non-zero probability (given by the label). The catalysis matrix P, which depends on the parameter p, is shown for each system. It can readily be shown that the overall level of catalysis (expected number of reactions catalysed per molecule) is the same in all three scenarios.