Figure 6.

Correlations between the evolutionary rate differences of domains within multidomain proteins and the same domain pairs from separate proteins. Each data point corresponds to a pair of SCOP superfamilies (S¹, S²) that is observed at least once in the same multidomain protein in a genome. X-axis: mean of log₁₀ of the ratios of evolution rates of all combination of domains (D_i¹, D_j²) where D_i¹ ∈ S¹ and D_j² ∈ S². Y-axis: mean of log₁₀ of the ratios of evolution rates of all combination of domains (D_i¹, D_j²) where D_i¹ ∈ S¹, D_j² ∈ S² and (D_i¹, D_j²) belong to the same multidomain protein. A – Human proteins. B – Randomized human protein sequences. C – Arabidopsis proteins. D – Randomized Arabidopsis protein sequences.