5MDX:
reference: Subunit and chlorophyll organization of the plant photosystem II supercomplex., van Bezouwen LS, Caffarri S, Kale RS, Kouril R, Thunnissen AWH, Oostergetel GT, Boekema EJ, Nat Plants. 2017 Jun 12;3:17080. doi: 10.1038/nplants.2017.80. PMID: 28604725

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