Lineage for Fold d.121: DNA topoisomerase I domain
- Root: SCOP 1.73
Class d: Alpha and beta proteins (a+b) [53931] (334 folds) 
Fold d.121: DNA topoisomerase I domain [55868] (1 superfamily)
beta(2)-alpha-beta-(alpha)-beta(2); left-handed crossover between strands 2 & 3
Superfamily:
d.121.1: DNA topoisomerase I domain [55869] (1 family) 
More info for Fold d.121: DNA topoisomerase I domain
Timeline for Fold d.121: DNA topoisomerase I domain:
- Fold d.121: DNA topoisomerase I domain first appeared (with stable ids) in SCOP 1.55
- Fold d.121: DNA topoisomerase I domain appears in SCOP 1.71
- Fold d.121: DNA topoisomerase I domain appears in SCOP 1.75
- Fold d.121: DNA topoisomerase I domain appears in the current release, SCOPe 2.08