Lineage for Family c.47.1.21: NQO2-like

1. Root: SCOP 1.73

2. Class c: Alpha and beta proteins (a/b) [51349] (141 folds)

3. Fold c.47: Thioredoxin fold [52832] (2 superfamilies) core: 3 layers, a/b/a; mixed beta-sheet of 4 strands, order 4312; strand 3 is antiparallel to the rest

4. Superfamily c.47.1: Thioredoxin-like [52833] (22 families)

5. Family c.47.1.21: NQO2-like [142405] (1 protein) complex I 24 kDa subunit; contains 2Fe-2S cluster in the active site; includes extra N-terminal four-helical bundle