Fold: POZ domain

core: beta(2)-alpha(2)-beta(2)-alpha(2); 2 layers a/b; mixed sheet: 2143

Lineage:

1. Root: scop
2. Class: Alpha and beta proteins (a+b)
   Mainly antiparallel beta sheets (segregated alpha and beta regions)
3. Fold: POZ domain
   core: beta(2)-alpha(2)-beta(2)-alpha(2); 2 layers a/b; mixed sheet: 2143

Superfamilies:

1. POZ domain (2)
   1. BTB/POZ domain (2)
   2. Tetramerization domain of potassium channels (5)