6FKV:
reference: The quaternary structure of Thermus thermophilus aldehyde dehydrogenase is stabilized by an evolutionary distinct C-terminal arm extension., Hayes K, Noor M, Djeghader A, Armshaw P, Pembroke T, Tofail S, Soulimane T, Sci Rep. 2018 Sep 6;8(1):13327. doi: 10.1038/s41598-018-31724-8. PMID: 30190503

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