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From 2010.igem.org

PT7/cI hybrid promoter   BBa_K396000
    low unregulated, repressed by cI, activated by T7, repression is stronger than activation.

T7/CI-OR1 hybrid promoter 【Abstract】 T7/CI-OR1 hybrid promoter was designed to be activated by T7 RNA Polymerase and repressed by lambda CI protein. In sequence design, lambda CI operator site 1 (OR1, Part of BBa_R1051) was directly attached to the downstream of T7 promoter sequence (BBa_I719005). This characterization was implemented to validate the promoter function. In results, the activation and repression was actually observed.