3THG:
reference: Atomic resolution x-ray structure of the substrate recognition domain of higher plant ribulose-bisphosphate carboxylase/oxygenase (Rubisco) activase., Henderson JN, Kuriata AM, Fromme R, Salvucci ME, Wachter RM, J Biol Chem. 2011 Oct 14;286(41):35683-8. Epub 2011 Aug 31. PMID: 21880724

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