6YIR:
reference: Multitask ATPases (NBDs) of bacterial ABC importers type I and their interspecies exchangeability., Leisico F, Godinho LM, Goncalves IC, Silva SP, Carneiro B, Romao MJ, Santos-Silva T, de Sa-Nogueira I, Sci Rep. 2020 Nov 11;10(1):19564. doi: 10.1038/s41598-020-76444-0. PMID: 33177617

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