| 5UJN: reference: Linkage via K27 Bestows Ubiquitin Chains with Unique Properties among Polyubiquitins., Castaneda CA, Dixon EK, Walker O, Chaturvedi A, Nakasone MA, Curtis JE, Reed MR, Krueger S, Cropp TA, Fushman D, Structure. 2016 Mar 1;24(3):423-36. doi: 10.1016/j.str.2016.01.007. Epub 2016 Feb, 11. PMID: 26876099 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).