2AVU:
reference: Structure of the Escherichia coli FlhDC Complex, a Prokaryotic Heteromeric Regulator of Transcription., Wang S, Fleming RT, Westbrook EM, Matsumura P, McKay DB, J Mol Biol. 2006 Jan 27;355(4):798-808. Epub 2005 Nov 22. PMID: 16337229

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