5NPU:
reference: Crystal structure of an inferred ancestral bacterial pyruvate decarboxylase., Buddrus L, Andrews ESV, Leak DJ, Danson MJ, Arcus VL, Crennell SJ, Acta Crystallogr F Struct Biol Commun. 2018 Mar 1;74(Pt 3):179-186. doi:, 10.1107/S2053230X18002819. Epub 2018 Feb 26. PMID: 29497023

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