tokens: The 5 ' - flanking region , from nucleotide -837 to -336 , contains TATA and inverted CAAT boxes as well as GATA-1 / SP1 erythroid specific cis acting regulatory elements .
folded_tokens: the 5 ' - flanking region , from nucleotide -837 to -336 , contain ta and inverted caat box as well as gata-1 / sp1 erythroid specific ci act regulatory element .