Number of Protein Chains:4
- Classes: Small proteins
 - Folds: BPTI-like
 - Superfamilies: BPTI-like
 - Families: Small Kunitz-type inhibitors & BPTI-like toxins
 
Protein Domains:
- Alzheimer's amyloid B-protein precursor, APPI
 - Pancreatic trypsin inhibitor, BPTI
 
	* [ ] : Polypeptide  - [AB] : Protein, [ab] : Small peptide
* ( ) : Nucleic acid - (AB) : DNA, (ab) : RNA
	
* ( ) : Nucleic acid - (AB) : DNA, (ab) : RNA
