1XT8:
reference: An ATP-binding cassette-type cysteine transporter in Campylobacter jejuni inferred from the structure of an extracytoplasmic solute receptor protein., Muller A, Thomas GH, Horler R, Brannigan JA, Blagova E, Levdikov VM, Fogg MJ, Wilson KS, Wilkinson AJ, Mol Microbiol 2005 Jul;57(1):143-55. PMID: 15948956

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