Lineage

Root
1. Class All alpha proteins [46456] (46456)
2. Fold DNA/RNA-binding 3-helical bundle (46688)

core: 3-helices; bundle, closed or partly opened, right-handed twist; up-and down

Superfamily

"Winged helix" DNA-binding domain (46785)

contains a small beta-sheet (wing)
Superfamily

Family Children