5BVL:
reference: De novo design of a four-fold symmetric TIM-barrel protein with atomic-level accuracy., Huang PS, Feldmeier K, Parmeggiani F, Fernandez Velasco DA, Hocker B, Baker D, Nat Chem Biol. 2015 Nov 23. doi: 10.1038/nchembio.1966. PMID: 26595462

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