So, together this entire region is known as the promoter. So just like operons in prokaryotic cells contain promoters, so do these Eukaryotic genes, but the promoters of Eukaryotic genes are much more complex. So we have different parts of the promoter, so the promoter can be broken down into the core promoter, which is basically shown in pink, this is our core promoter, and these remaining promoters are known as the upstream promoters. 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.