6BHU:
reference: ATP Binding Enables Substrate Release from Multidrug Resistance Protein 1., Johnson ZL, Chen J, Cell. 2018 Jan 11;172(1-2):81-89.e10. doi: 10.1016/j.cell.2017.12.005. Epub 2017 , Dec 28. PMID: 29290467

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