Lineage for Superfamily b.20.1: ENV polyprotein, receptor-binding domain
- Root: SCOP 1.75
Class b: All beta proteins [48724] (174 folds) 
Fold b.20: ENV polyprotein, receptor-binding domain [49829] (1 superfamily)
sandwich; 9 strands in 2 sheets; greek-key; contains a few helices in loop regionsSuperfamily b.20.1: ENV polyprotein, receptor-binding domain [49830] (1 family) 
Family:
b.20.1.1: ENV polyprotein, receptor-binding domain [49831] (2 proteins)
More info for Superfamily b.20.1: ENV polyprotein, receptor-binding domain
Timeline for Superfamily b.20.1: ENV polyprotein, receptor-binding domain:
- Superfamily b.20.1: ENV polyprotein, receptor-binding domain first appeared (with stable ids) in SCOP 1.55, called Superfamily b.20.1: F-MuLV receptor-binding domain
- Superfamily b.20.1: ENV polyprotein, receptor-binding domain appears in SCOP 1.73
- Superfamily b.20.1: ENV polyprotein, receptor-binding domain appears in SCOPe 2.01
- Superfamily b.20.1: ENV polyprotein, receptor-binding domain appears in the current release, SCOPe 2.08