5EP4:
reference: Structure, Regulation, and Inhibition of the Quorum-Sensing Signal Integrator LuxO., Boyaci H, Shah T, Hurley A, Kokona B, Li Z, Ventocilla C, Jeffrey PD, Semmelhack MF, Fairman R, Bassler BL, Hughson FM, PLoS Biol. 2016 May 24;14(5):e1002464. doi: 10.1371/journal.pbio.1002464., eCollection 2016 May. PMID: 27219477

This OCA Structure page
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