1P3W:
reference: Crystal structure of IscS, a cysteine desulfurase from Escherichia coli., Cupp-Vickery JR, Urbina H, Vickery LE, J Mol Biol 2003 Jul 25;330(5):1049-59. PMID: 12860127

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