Fold: Insulin-like

nearly all-alpha
can be classified as disulphide-rich

Lineage:

1. Root: scop
2. Class: Small proteins
   Usually dominated by metal ligand, heme, and/or disulfide bridges
3. Fold: Insulin-like
   nearly all-alpha
   can be classified as disulphide-rich

Superfamilies:

1. Insulin-like (1)
   1. Insulin-like (6)
      1. Insulin
         1. Cow (Bos taurus) (6)
         2. Human (Homo sapiens) (42)
         3. Pig (Sus scrofa) (15)
      2. Relaxin
         1. Human (Homo sapiens) (1)
      3. Insulin-like growth factor
         1. Human (Homo sapiens) (6)
      4. Bombyxin-II
         1. Silkworm (Bombyx mori) (2)