3ETC:
reference: The 2.1 A crystal structure of an acyl-CoA synthetase from Methanosarcina acetivorans reveals an alternate acyl-binding pocket for small branched acyl substrates., Shah MB, Ingram-Smith C, Cooper LL, Qu J, Meng Y, Smith KS, Gulick AM, Proteins. 2009 May 18. PMID: 19544569

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