Now, notice that the core promoter, this entire segment, is found upstream to the left of the start side. In fact, usually this is located about 40 basis to the left of our start side. Now, this core promoter basically doesn't change from one eukaryotic gene to another eukaryotic gene, so it remains consistent. In fact, the most common type of core promoter is the Tata box core promoter. And the reason we call it Tata box is because the sequence of nucleotides is Tata, and that doesn't change when we go from one eukaryotic gene to another. So that recurs between different or that recurs within different types of eukaryotic genes.