1GCB:
reference: Crystal structure of a conserved protease that binds DNA: the bleomycin hydrolase, Gal6., Joshua-Tor L, Xu HE, Johnston SA, Rees DC, Science 1995 Aug 18;269(5226):945-50. PMID: 7638617

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