4MXF:
reference: Interactions of gold-based drugs with proteins: crystal structure of the adduct formed between ribonuclease A and a cytotoxic gold(iii) compound., Messori L, Scaletti F, Massai L, Cinellu MA, Russo Krauss I, di Martino G, Vergara A, Paduano L, Merlino A, Metallomics. 2013 Nov 29. PMID: 24287583

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