5VJ1:
reference: Crystal structure of a Pseudomonas malonate decarboxylase holoenzyme hetero-tetramer., Maderbocus R, Fields BL, Hamilton K, Luo S, Tran TH, Dietrich LEP, Tong L, Nat Commun. 2017 Jul 31;8(1):160. doi: 10.1038/s41467-017-00233-z. PMID: 28757619

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