5AEC:
reference: NCS-constrained exhaustive search using oligomeric models., Isupov MN, Lebedev AA, Acta Crystallogr D Biol Crystallogr. 2008 Jan;64(Pt 1):90-8. Epub 2007 Dec 5. PMID: 18094472

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