4I7Z:
reference: Lipid-induced conformational changes within the cytochrome b6f complex of oxygenic photosynthesis., Hasan SS, Stofleth JT, Yamashita E, Cramer WA, Biochemistry. 2013 Apr 16;52(15):2649-54. doi: 10.1021/bi301638h. Epub 2013 Apr, 5. PMID: 23514009

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