6MR6:
reference: Structural evidence for dimer-interface driven regulation of the type II cysteine desulfurase, SufS., Dunkle JA, Bruno M, Outten FW, Frantom PA, Biochemistry. 2018 Dec 20. doi: 10.1021/acs.biochem.8b01122. PMID: 30571100

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