 This CpG Island begins 731-bp upstream of the promoter and no core promoter element, such as a TATA or CCATT box, has been found within it.Although no core promoter element has been found, consensus binding sequences have been identified in the 5’ UTR for several transcription factors such as Sp1 and AP2.A methylation map of five regions of the promoter in both mouse and human was published in 1999.