Evolutionary correlations between peptidases and their inhibitors. Dispersion graphs showing the linear trend of the two variables represented, the correlation coefficient of the line (R2) and the statistical result of the correlation statistical analysis (ρ; p < 0.05). Variables represented: (A) Number of S8 Subtilisins and their inhibitors. (B) Number of C1A Papains and their inhibitors. (C) Number of C1A Papains and S8 Subtilisins. (D) Number of S8 inhibitors and C1A inhibitors.