As expected , expression of known AraC-regulated genes , i.e. , araB , araA , araD , araE , araF , araG , araH , and araJ , increased substantially upon addition of arabinose in wild-type cells and was substantially higher in wildtype cells than araC cells in the presence of arabinose ( Table 2 ) .
Together with a bioinformatic analysis of other Enterobacteriaceae species , these data identify a conserved AraC regulon that includes 7 previously described AraC-regulated genes ( araB , araA , araD , araE , araF , araG , and araH ) as well as three novel targets identified in this work ( ytfQ , araT , and araU ) .