2UZH:
reference: The structure of Mycobacteria 2C-methyl-D-erythritol-2,4-cyclodiphosphate synthase, an essential enzyme, provides a platform for drug discovery., Buetow L, Brown AC, Parish T, Hunter WN, BMC Struct Biol. 2007 Oct 23;7(1):68. PMID: 17956607

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