Fig. 5: Activity on multiple substrates and co-option potential.
From: Emergent properties as by-products of prebiotic evolution of aminoacylation ribozymes

The frequency distribution of the fraction of unique sequences in each family (y-axis) that is active on a given number of substrates (x-axis). Activity on 2 or more substrates indicates potential for co-option. While Motif 2 sequences (Families 2.1 and 2.2) show a higher abundance of sequences active on more substrates, all families possess some sequences with activity on multiple substrates. Inset shows an enlargement of the low y-value region of the plot. Source data are provided as a Source Data file.