2JEX:
reference: Transcription activator structure reveals redox control of a replication initiation reaction., Sanders CM, Sizov D, Seavers PR, Ortiz-Lombardia M, Antson AA, Nucleic Acids Res. 2007;35(10):3504-15. Epub 2007 May 3. PMID: 17478495

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