1GYT:
reference: X-ray structure of aminopeptidase A from Escherichia coli and a model for the nucleoprotein complex in Xer site-specific recombination., Strater N, Sherratt DJ, Colloms SD, EMBO J 1999 Aug 16;18(16):4513-22. PMID: 10449417

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