3I5A:
reference: Determinants for the Activation and Autoinhibition of the Diguanylate Cyclase Response Regulator WspR., De N, Navarro MV, Raghavan RV, Sondermann H, J Mol Biol. 2009 Aug 18. PMID: 19695263

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