2AVX:
reference: Structure of the Escherichia coli quorum sensing protein SdiA: activation of the folding switch by acyl homoserine lactones., Yao Y, Martinez-Yamout MA, Dickerson TJ, Brogan AP, Wright PE, Dyson HJ, J Mol Biol. 2006 Jan 13;355(2):262-73. Epub 2005 Nov 8. PMID: 16307757

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