Catalytic promiscuity in the RNA World may have aided the evolution of prebiotic metabolism
Fig 5
Trade-off surfaces with two enzyme activities.
The surfaces delimit the section of the trait space that replicators can occupy in case of A = 2. The surfaces are calculated by Eqs 6 and 7; all replicators take trait values from below the trade-off surfaces shown. The axes are the two enzymatic activities (E1 and E2) and replicability (k). Catalytic (activity/activity) trade-off differs in columns (left: strong, middle: neutral, right: weak) and activity/replicability trade-off differs in rows similarly (bottom: strong, middle: neutral, top: weak).