4DZ1:
reference: Characterization of DalS, an ATP-binding cassette transporter for D-alanine, and its role in pathogenesis in Salmonella enterica., Osborne SE, Tuinema BR, Mok MC, Lau PS, Bui NK, Tomljenovic-Berube AM, Vollmer W, Zhang K, Junop M, Coombes BK, J Biol Chem. 2012 Mar 14. PMID: 22418438

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