4YXW:
reference: How release of phosphate from mammalian F1-ATPase generates a rotary substep., Bason JV, Montgomery MG, Leslie AG, Walker JE, Proc Natl Acad Sci U S A. 2015 Apr 27. pii: 201506465. PMID: 25918412

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