1YME:
reference: Carboxypeptidase A: native, zinc-removed and mercury-replaced forms., Greenblatt HM, Feinberg H, Tucker PA, Shoham G, Acta Crystallogr D Biol Crystallogr 1998 May 1;54 ( Pt 3):289-305. PMID: 9867434

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