2SCU:
reference: A detailed structural description of Escherichia coli succinyl-CoA synthetase., Fraser ME, James MN, Bridger WA, Wolodko WT, J Mol Biol 1999 Jan 29;285(4):1633-53. PMID: 9917402

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