Superfamily: Immunoglobulin-binding domains

Lineage:

1. Root: scop
2. Class: Alpha and beta proteins (a+b)
   Mainly antiparallel beta sheets (segregated alpha and beta regions)
3. Fold: beta-Grasp (ubiquitin-like)
   core: beta(2)-alpha-beta(2); mixed beta-sheet 2143
4. Superfamily: Immunoglobulin-binding domains

Families:

1. Immunoglobulin-binding domains (2)
   1. Immunoglobulin-binding protein G, different constituent domains
      1. Streptococcus sp., group G (14)
   2. Immunoglobulin light chain-binding domain of protein L
      1. Peptostreptococcus magnus (1)