Fold: Ovomucoid/PCI-1 like inhibitors

disulphide-rich small alpha+beta fold

Lineage:

1. Root: scop
2. Class: Small proteins
   Usually dominated by metal ligand, heme, and/or disulfide bridges
3. Fold: Ovomucoid/PCI-1 like inhibitors
   disulphide-rich small alpha+beta fold

Superfamilies:

1. Ovomucoid/PCI-1 like inhibitors (2)
   two families share the same beta-sheet topology but differ in the active-site loop location
   1. Animal Kazal-type inhibitors (10)
   2. Plant proteinase inhibitors (2)