Cooperation vs. selfishness. The cooperation (green nodes) and selfish (red nodes) reaction network is shown in the inset. The green nodes form an RAF set of size three. The plot shows the result of a molecular flow simulation on this reaction network. The green line shows the concentration of E1+E2+E2, while the red line shows the concentration of S1+S2+S3. At around time point 2, all molecules of type E3 and S3 are removed from the system, and a new supply of their food molecules is provided.