4Z3D:
reference: Structural insights on the catalytic site protection of human carbonyl reductase 1 by glutathione., Liang Q, Liu R, Du S, Ding Y, J Struct Biol. 2015 Oct;192(1):138-44. doi: 10.1016/j.jsb.2015.09.005. Epub 2015 , Sep 14. PMID: 26381805

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