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Fig. 3 | BMC Evolutionary Biology

Fig. 3

From: From molecular to cellular form: modeling the first major transition during the arising of life

Fig. 3

The influence of non-enzymatic nucleotide-synthesis rate on the spread of REP. The case shown in black is the same as the one of Fig. 2. At step 3 × 106, PNF is changed, deriving the cases shown in other colors. The color legends at the lower left apply to both of the two subfigures. Notably, here we use different PNF values until REP reaches a stable level instead of from the beginning. If we adopt a low PNF from the beginning (the green, cyan, and blue lines), we would only see that REP does not rise and spread, and will never see the more impressive result that a low PNF may even “destroy” a REP-thriving system; and we would not observe that the influence of different low PNF values may be different – the lowest PNF would be the worst (the blue line). In fact, changing the values in the midway of one case may demonstrate more directly and vividly the influence of the parameter on the dynamics of the model system. Similar consideration has also been taken in some other analyses shown below

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