Overview of the four <a href="https://en.wikipedia.org/wiki/core_promoter_element" class="extiw" title="w:core promoter element">core promoter elements</a> <i><a href="https://en.wikipedia.org/wiki/B_recognition_element" class="extiw" title="w:B recognition element">B recognition element</a> (BRE)</i>, <i><a href="https://en.wikipedia.org/wiki/TATA_box" class="extiw" title="w:TATA box">TATA box</a></i>, <i><a href="https://en.wikipedia.org/wiki/initiator_element" class="extiw" title="w:initiator element">initiator element</a></i> (Inr), and <i><a href="https://en.wikipedia.org/wiki/downstream_promoter_element" class="extiw" title="w:downstream promoter element">downstream promoter element</a> (DPE)</i>, showing their respective <a href="https://en.wikipedia.org/wiki/consensus_sequence" class="extiw" title="w:consensus sequence">consensus sequences</a> and their distance from the <a href="https://en.wikipedia.org/wiki/Transcription_(genetics)" class="extiw" title="w:Transcription (genetics)">transcription</a> start site. The <i>Inr</i> consensus sequence is shown for the <a href="https://en.wikipedia.org/wiki/model_organism" class="extiw" title="w:model organism">model organism</a> <i><a href="https://en.wikipedia.org/wiki/Drosophila_melanogaster" class="extiw" title="w:Drosophila melanogaster">Drosophila melanogaster</a></i> (Dm) as well as for humans (Hs).
Jennifer E.F. Butler &amp; James T. Kadonaga
Butler &amp; Kadonaga (2002) <a rel="nofollow" class="external text" href="http://genesdev.cshlp.org/content/16/20/2583.full">"The RNA polymerase II core promoter: a key component in the regulation of gene expression"</a>. <i><a href="https://en.wikipedia.org/wiki/Genes_%26_Development" class="extiw" title="w:Genes &amp; Development">Genes &amp; Development</a></i> <b>16</b> (20): 2583–2592. <a href="https://en.wikipedia.org/wiki/Digital_object_identifier" class="extiw" title="w:Digital object identifier">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1101%2Fgad.1026202">10.1101/gad.1026202</a>. <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pubmed/12381658?dopt=Abstract">PMID 12381658</a>.