A/T stretches

[clemens suter-crazzolara]

dear colleagues,
we have cloned a rna gene of 1100 bp. this gene contains 4 stretches of at least
 10 A or 10 T residues, one of them located between enhancer and promoter.
does anyone know whether these A or T rich stretches have a function,
or how they have arisen ? can they influence transcription ?
The gene is probably transcribed by PolII and it is mammalian.

thanks,

clemens (or do I have to sign "woof" ?????)