6C4L:
reference: Staphylopine, pseudopaline and yersinopine dehydrogenases: a structural and kinetic analysis of a new functional class of opine dehydrogenase., McFarlane JS, Davis CL, Lamb AL, J Biol Chem. 2018 Apr 4. pii: RA118.002007. doi: 10.1074/jbc.RA118.002007. PMID: 29618515

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