1PCA:
reference: Three-dimensional structure of porcine pancreatic procarboxypeptidase A. A comparison of the A and B zymogens and their determinants for inhibition and activation., Guasch A, Coll M, Aviles FX, Huber R, J Mol Biol 1992 Mar 5;224(1):141-57. PMID: 1548696

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).