6ARD:
reference: Microfocus diffraction from different regions of a protein crystal: structural variations and unit-cell polymorphism., Thompson MC, Cascio D, Yeates TO, Acta Crystallogr D Struct Biol. 2018 May 1;74(Pt 5):411-421. doi:, 10.1107/S2059798318003479. Epub 2018 Apr 24. PMID: 29717712

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