4IJO:
reference: Unraveling Hidden Regulatory Sites in Structurally Homologous Metalloproteases., Udi Y, Fragai M, Grossman M, Mitternacht S, Arad-Yellin R, Calderone V, Melikian M, Toccafondi M, Berezovsky IN, Luchinat C, Sagi I, J Mol Biol. 2013 Apr 11. pii: S0022-2836(13)00240-4. doi:, 10.1016/j.jmb.2013.04.009. PMID: 23583775

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