1OAD:
reference: SAD manganese in two crystal forms of glucose isomerase., Ramagopal UA, Dauter M, Dauter Z, Acta Crystallogr D Biol Crystallogr 2003 May;59(Pt 5):868-75. PMID: 12777803

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