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. Author manuscript; available in PMC: 2014 Jan 1.
Published in final edited form as: Mol Microbiol. 2012 Nov 19;87(1):94–111. doi: 10.1111/mmi.12085

Fig. 9. A model of proposed activities of CepR2 and CepS.

Fig. 9

In this model, apo-CepR2 binds to a single site between the bcam0191 and bcam0192 promoters. Bound CepR2 inhibits the stimulatory activity of CepS, which binds between CepR2 and the two target promoters. At high-cell density, OHL accumulates and releases CepR2 from the DNA, permitting CepS to activate both promoters. CepR2 thus functions as an antiactivator of CepS.