Help! how to get sequence around TSS and stop exon?

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54016565
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Help! how to get sequence around TSS and stop exon?

Hi guys,

I was trying to find TF by using FIRE, and I would like to update its original sequence files. Therefore I need to get for each RefSeq, a sequence of 4000 bases; 2000 upstream the TSS, 2000 downstream from the TSS for all mouse genes.

And I would also like to get a file contain sequence of 0nt upstream of stop codon, 1000nt downstream for each RefSeq from STOP CODON.

Any kind of introductions would be most appreciated!