You need a special tool for this kind of job.  For example:

http://www.biomedcentral.com/1471-2105/3/8
tacg – a grep for DNA
Harry J Mangalam
BMC Bioinformatics 2002, 3:8doi:10.1186/1471-2105-3-8

The references in that article refer to other mechanisms to do
this type of genome pattern matching.

--Hiram

Jenn Betancourt wrote:
> Hi,
> 
> I have a question regarding the use of the genome browser.  I am trying to 
> identify how many genes in the mouse genome contain the following sequence:
> 
> ttggc(n5)gccaa
> 
> this is a consensus sequence specific for a trancription factor that  I study 
> and am trying to get an idea of how many possible genes this factor can 
> potentially regulate upon binding to the sequence.  What is the best way to 
> go about doing this using genome browser?
> 
> Thanks,
> Jenn
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