5IK2:
reference: Regulation of the thermoalkaliphilic F1-ATPase from Caldalkalibacillus thermarum., Ferguson SA, Cook GM, Montgomery MG, Leslie AG, Walker JE, Proc Natl Acad Sci U S A. 2016 Sep 27;113(39):10860-5. doi:, 10.1073/pnas.1612035113. Epub 2016 Sep 12. PMID: 27621435

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