6Q4P:
reference: Binding and Transport of Carboxylated Drugs by the Multidrug Transporter AcrB., Tam HK, Malviya VN, Foong WE, Herrmann A, Malloci G, Ruggerone P, Vargiu AV, Pos KM, J Mol Biol. 2020 Feb 14;432(4):861-877. doi: 10.1016/j.jmb.2019.12.025. Epub 2019, Dec 25. PMID: 31881208

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