Figure 23.1.1.2 

`CATHerine wheel' plot showing the distribution of non-homologous structures [i.e. a single representative from each homologous superfamily (H level) in CATH] amongst the different classes (C), architectures (A) and fold families (T) in the CATH database. Protein classes are shown coloured as red (mainly α), green (mainly β), and yellow (α–β). Within each class, the angle subtended for a given segment reflects the proportion of structures within the identified architectures (inner circle) or fold families (outer circle). MOLSCRIPT (Kraulis, 1991) illustrations are shown for representative examples from the superfold families.