3DGL:
reference: A synthetic protein selected for ligand binding affinity mediates ATP hydrolysis., Simmons CR, Stomel JM, McConnell MD, Smith DA, Watkins JL, Allen JP, Chaput JC, ACS Chem Biol. 2009 Aug 21;4(8):649-58. PMID: 19522480

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