5UJ9:
reference: Structural Basis of Substrate Recognition by the Multidrug Resistance Protein MRP1., Johnson ZL, Chen J, Cell. 2017 Mar 9;168(6):1075-1085.e9. doi: 10.1016/j.cell.2017.01.041. Epub 2017 , Feb 23. PMID: 28238471

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