Fig 4. Structural superimpositions for the 10 clusters comprising 96 sites in the SS132 dataset.

Pairs of sites were superimposed on their 7 Cα atoms and the Cβ of the central S/T. Their pairwise RMSD were clustered with complete linkage and Euclidean distance. Clusters were defined by a 3 Å threshold. Green, yellow and grey represent residues in H, E, C secondary structures respectively.