Sequence divergence in families and superfamilies. Graph shows the maximum sequence diversity between two members of the same superfamily (or family) in SCOP. Domains which continue to diverge beyond detectable sequence identity have their distribution collapsed to the far left side of the graph; the large number with zero percent sequence identity represent those cases in which BLAST was unable to find alignment.
Pethica et al. BMC Structural Biology 2012 12:27 doi:10.1186/1472-6807-12-27