Lineage for Superfamily a.25.6: SO2669-like

1. Root: SCOPe 2.04

2. Class a: All alpha proteins [46456] (285 folds)

3. Fold a.25: Ferritin-like [47239] (6 superfamilies) core: 4 helices; bundle, closed, left-handed twist; 1 crossover connection

4. Superfamily a.25.6: SO2669-like [158418] (1 family) (homo)dimer of alpha-hairpin subunits similar to that of the half-ferritin family; no bound metals