Figure 4

Simulations of the evolution of the proteome. a. It was also assumed that at the beginning of the evolution, all proteins were essential for life processes (N = Y). b. It was also assumed that at the beginning of the evolution, there were no proteins essential for life processes (Y = 0). Axis t indicates time, and N and Y indicate the total number of proteins and the number of proteins essential for life processes, respectively. The continuous line represents the theoretical predictions of the model.