Fold: Hemocyanin, N-terminal domain

6 helices; bundle; one central helix is surrounded by 5 others

Lineage:

1. Root: scop
2. Class: All alpha proteins
3. Fold: Hemocyanin, N-terminal domain
   6 helices; bundle; one central helix is surrounded by 5 others

Superfamilies:

1. Hemocyanin, N-terminal domain (1)
   1. Hemocyanin, N-terminal domain (2)
      1. Hemocyanin, N-terminal domain
         Middle domain is all-alpha; C-terminal domain is immunoglobulin-like sandwich
         1. Horseshoe crab (Limulus polyphemus) (4)
         2. Spiny lobster (Panulirus interruptus) (7)