| 6A42: reference: Crystal Structure Determination of Ubiquitin by Fusion to a Protein That Forms a Highly Porous Crystal Lattice., Maita N, J Am Chem Soc. 2018 Oct 10. doi: 10.1021/jacs.8b07512. PMID: 30299944 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).