Predicted probability and FFL abundance. In (a) we compare the natural abundance and its predicted counterpart ρ(Γ
). S. cerevisiae (black box) is compared to E. coli (white box) and the predicted probabilities (black triangle). In (b) we present the correlation between ρ(Γ
) and the natural abundances. The Pearson coefficient for the linear fit is r = 0.91 and r = 0.94 for E. coli and S. cerevisiae, respectively.