3DSR:
reference: Structure of the nucleotide-binding subunit B of the energy producer A1A0 ATP synthase in complex with adenosine diphosphate., Kumar A, Manimekalai MS, Gruber G, Acta Crystallogr D Biol Crystallogr. 2008 Nov;64(Pt 11):1110-5. Epub 2008, Oct 18. PMID: 19020348

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