4Z0H:
reference: Tuning Cysteine Reactivity and Sulfenic Acid Stability by Protein Microenvironment in Glyceraldehyde-3-Phosphate Dehydrogenases of Arabidopsis thaliana., Zaffagnini M, Fermani S, Calvaresi M, Orru R, Iommarini L, Sparla F, Falini G, Bottoni A, Trost P, Antioxid Redox Signal. 2016 Mar 20;24(9):502-17. doi: 10.1089/ars.2015.6417. Epub, 2016 Feb 1. PMID: 26650776

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