And we'll discuss what that means in just a moment. And to the left of our cap side of site number three we have the gene that codes for the repressor protein and we also have the promoter of our gene that codes for the repressive protein. So let's discuss once again what happens when our cell contains a high concentration of glucose. So when glucose concentration is high RNA polymerase will bind to the promoter region so region number one and when RNA polymerase binds to our promoter region it will basically transcribe this DNA molecule into an mRNA molecule and then that mRNA molecule will be used by the ribosome to basically synthesize the repressor protein. And once a repressive protein is formed it will go on and bind to site number five. So site number five is one of the control sites.