So we see that one of these promoter sites is found 35 nucleotides from the start of that transcription process. And the other one, called the primal box, is found ten nucleotides from the start. And so when that RNA polymerase is traveling along our double stranded DNA molecule in that bacterial cell it eventually travels very, very quickly until it locates these regions. And the reason it slows down is because it binds well to these regions. And once it binds well, it begins the process of transcription. Now remember, RNA polymerase reads our DNA molecule from the three to five end and it synthesizes from the five to three end.