1M42:
reference: Solution structure of CopC: a cupredoxin-like protein involved in copper homeostasis., Arnesano F, Banci L, Bertini I, Thompsett AR, Structure (Camb) 2002 Oct;10(10):1337-47. PMID: 12377120

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