| 1NSA: reference: Three-dimensional structure of porcine procarboxypeptidase B: a structural basis of its inactivity., Coll M, Guasch A, Aviles FX, Huber R, EMBO J 1991 Jan;10(1):1-9. PMID: 1989878 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).