3H1U:
reference: Crystallographic structure of ubiquitin in complex with cadmium ions., Qureshi IA, Ferron F, Seh CC, Cheung P, Lescar J, BMC Res Notes. 2009 Dec 15;2:251. PMID: 20003470

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