1ITP:
reference: Structure of POIA1, a homologous protein to the propeptide of subtilisin: implication for protein foldability and the function as an intramolecular chaperone., Sasakawa H, Yoshinaga S, Kojima S, Tamura A, J Mol Biol 2002 Mar 15;317(1):159-67. PMID: 11916386

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