5LS4:
reference: Activity inhibition and crystal polymorphism induced by active-site metal swapping., Yekwa E, Khourieh J, Canard B, Papageorgiou N, Ferron F, Acta Crystallogr D Struct Biol. 2017 Aug 1;73(Pt 8):641-649. doi:, 10.1107/S205979831700866X. Epub 2017 Jul 28. PMID: 28777079

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