How can I find genomic sequence of a transcript - (May/05/2011 )

Hi
I haven't used bioinformatics for a bit so I need some memory refreshement.

I know how to find the nt sequence of a transcript. (on NCBI Nucleotide)
But how can I find the genomic sequence that codes for it (in other words the sequence on the genome that encodes it)?
Specifically I need this, so I can find the flanking sequences of a gene.

use ensembl biomart

http://www.ensembl.org/biomart/martview//c644ac1dc364f1db59a2e33876767c0d