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 (Nā€‰=ā€‰Y). b. It was also assumed that at the beginning of the evolution, there were no proteins essential for life processes (Yā€‰=ā€‰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.

Pawlowski et al. BMC Genomics 2013 14:172   doi:10.1186/1471-2164-14-172
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