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. 2008 Dec 22;2(1):15–30. doi: 10.1111/j.1751-7915.2008.00048.x

Figure 3.

Figure 3

Mechanism of induction of the RhaR‐RhaS/rhaBAD system (modified with permission from Altenbuchner and Mattes, 2005). l‐rhamnose is actively transported into the cells and it binds to RhaS which then becomes activated and stimulates transcription of rhaT (encoding l‐rhamnose transporter protein) and the rhaBAD operon (encoding l‐rhamnose catabolic enzymes). RhaR is also activated by l‐rhamnose and stimulates transcription of the rhaSR operon (encoding RhaR and RhaS). The catabolite repression is indicated. For further details see text section The RhaR‐RhaS/rhaBAD system shares many expression properties with AraC/PBAD.