4LMA:
reference: Structural and biochemical analyses of Microcystis aeruginosa O-acetylserine sulfhydrylases reveal a negative feedback regulation of cysteine biosynthesis., Lu M, Xu BY, Zhou K, Cheng W, Jiang YL, Chen Y, Zhou CZ, Biochim Biophys Acta. 2014 Feb;1844(2):308-15. doi: 10.1016/j.bbapap.2013.11.008., Epub 2013 Nov 23. PMID: 24275508

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