CATH protein domain classification (version 4.2) SillitoeIan DawsonNatalie OrengoChristine 2019 <strong>CATH is a classification of protein structures downloaded from the Protein Data Bank. </strong> We group protein domains into superfamilies when there is sufficient evidence they have diverged from a common ancestor. The files contained in this dataset correspond to the version 4.2 release of the CATH classification. <br>