6NBQ:
reference: Structure of the complex I-like molecule NDH of oxygenic photosynthesis., Laughlin TG, Bayne AN, Trempe JF, Savage DF, Davies KM, Nature. 2019 Feb;566(7744):411-414. doi: 10.1038/s41586-019-0921-0. Epub 2019 Feb, 11. PMID: 30742075

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