And some of that lactose will transform into another molecule known as alo lactose. And alo lactose is basically that allosteric molecule that will go on and bind to our repressor protein. And once it binds to the repressive protein, shown in red, it will inactivate that repressive protein. And that repressive protein that is bound to the operator will basically detach from the operator. And once it detaches, then our cap can basically bind to the cap side and that will activate the promoter region, this region that basically promotes the transcription of these genes. And so when our repressor is inactivated and our cap binds to our cap side, only then can the RNA polymerase actually bind to the promoter and begin the transcription of these genes.