Fold: dsRBD-like

alpha-beta(3)-alpha; 2 layers: alpha/beta

Lineage:

1. Root: scop
2. Class: Alpha and beta proteins (a+b)
   Mainly antiparallel beta sheets (segregated alpha and beta regions)
3. Fold: dsRBD-like
   alpha-beta(3)-alpha; 2 layers: alpha/beta

Superfamilies:

1. dsRNA-binding domain-like (2)
2. Porphobilinogen deaminase (hydroxymethylbilane synthase), C-terminal domain (1)
3. PI-Pfui intein middle domain (1)