1EX9:
reference: Crystal structure of pseudomonas aeruginosa lipase in the open conformation. The prototype for family I.1 of bacterial lipases., Nardini M, Lang DA, Liebeton K, Jaeger KE, Dijkstra BW, J Biol Chem 2000 Oct 6;275(40):31219-25. PMID: 10893416

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