5UBS:
reference: Rational design of proteins that exchange on functional timescales., Davey JA, Damry AM, Goto NK, Chica RA, Nat Chem Biol. 2017 Oct 23. doi: 10.1038/nchembio.2503. PMID: 29058725

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