2APS:
reference: Cu,Zn superoxide dismutase structure from a microbial pathogen establishes a class with a conserved dimer interface., Forest KT, Langford PR, Kroll JS, Getzoff ED, J Mol Biol 2000 Feb 11;296(1):145-53. PMID: 10656823

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