| Class j: Peptides [58231] (120 folds) | 
| Fold j.6: Peptide hormones [58283] (1 superfamily) contains one alpha-helix  | 
Superfamily j.6.1: Peptide hormones [58284] (1 family) ![]() this is not a true superfamily  | 
| Family j.6.1.1: Peptide hormones [58285] (19 proteins) | 
| Protein Calcitonin [58301] (3 species) | 
| Species Eel (Anguilla japonica) [TaxId:7937] [58302] (3 PDB entries) | 
| Domain d1bkua_: 1bku A: [46104] | 
| Domain d1byva_: 1byv A: [46105] complexed with nag  | 
| Domain d1bzba_: 1bzb A: [46103] | 
Timeline for Species Eel (Anguilla japonica) [TaxId:7937] from j.6.1.1 Calcitonin: