In bacteria, promoters are usually composed of three sequence elements, whereas in eukaryotes ... Most pol II genes have a TATA box (consensus sequence TATTAA) 25 to 35 bases upstream of the ...

However, despite the high degree of conservation at each position (ranging from 54% to 82% for each base), it is actually extremely rare to find a promoter that matches this consensus sequence ...

The numbers of the principal regulatory elements present in insulin promoters ... position –400 or the 5' limit of available promoter sequence. * The genomic sequence for the A5 box is ...